#include "bits/stdc++.h"
using namespace std;typedef long long lint;typedef vector<lint> liv;
//#define rep(i,n) for(int i=0;i<n;++i)
#define all(v) v.begin(),v.end()
#define linf 1152921504606846976
#define MAXN 100010
#define md 1000000007//998244353

#define pb push_back
#define _vcppunko4(tuple) _getname4 tuple
#define _getname4(_1,_2,_3,_4,name,...) name
#define _getname3(_1,_2,_3,name,...) name
#define _trep2(tuple) _rep2 tuple
#define _trep3(tuple) _rep3 tuple
#define _trep4(tuple) _rep4 tuple
#define _rep1(n) for(lint i=0;i<n;++i)
#define _rep2(i,n) for(lint i=0;i<n;++i)
#define _rep3(i,a,b) for(lint i=a;i<b;++i)
#define _rep4(i,a,b,c) for(lint i=a;i<b;i+=c)
#define _trrep2(tuple) _rrep2 tuple
#define _trrep3(tuple) _rrep3 tuple
#define _trrep4(tuple) _rrep4 tuple
#define _rrep1(n) for(lint i=n-1;i>=0;i--)
#define _rrep2(i,n) for(lint i=n-1;i>=0;i--)
#define _rrep3(i,a,b) for(lint i=b-1;i>=a;i--)
#define _rrep4(i,a,b,c) for(lint i=a+(b-a-1)/c*c;i>=a;i-=c)
template<class T>
istream& operator>>(istream& is,vector<T>& vec);
template<class T,size_t size>
istream& operator>>(istream& is,array<T,size>& vec);
template<class T,class L>
istream& operator>>(istream& is,pair<T,L>& p);
template<class T>
ostream& operator<<(ostream& os,vector<T>& vec);
template<class T,class L>
ostream& operator<<(ostream& os,pair<T,L>& p);
template<class T>
istream& operator>>(istream& is,vector<T>& vec){ for(T& x: vec) is>>x;return is; }
template<class T,class L>
istream& operator>>(istream& is,pair<T,L>& p){ is>>p.first;is>>p.second;return is; }
//template<class T>
//ostream& operator<<(ostream& os,vector<T>& vec){ os<<vec[0];rep(i,1,vec.size())os<<' '<<vec[i];return os; }
//template<class T>
//ostream& operator<<(ostream& os,deque<T>& deq){ os<<deq[0];rep(i,1,deq.size())os<<' '<<deq[i];return os; }
template<class T,class L>
ostream& operator<<(ostream& os,pair<T,L>& p){ os<<p.first<<" "<<p.second;return os; }

inline void in(){}
template <class Head,class... Tail>
inline void in(Head&& head,Tail&&... tail){ cin>>head;in(move(tail)...); }
template <class T>
inline bool out(T t){ cout<<t<<'\n';return 0; }
inline bool out(){ cout<<'\n';return 0; }
template <class Head,class... Tail>
inline bool out(Head head,Tail... tail){ cout<<head<<' ';out(move(tail)...);return 0; }

#define rep(...) _vcppunko4((__VA_ARGS__,_trep4,_trep3,_trep2,_rep1))((__VA_ARGS__))
#define rrep(...) _vcppunko4((__VA_ARGS__,_trrep4,_trrep3,_trrep2,_trrep1))((__VA_ARGS__))
#define lin(...) lint __VA_ARGS__;in(__VA_ARGS__)
#define stin(...) string __VA_ARGS__;in(__VA_ARGS__)
#define vin(type,name,size) vector<type> name(size);in(name)

int main(){
	lint xs=0,ys=0,cur=0;
	lin(n,m);
	vin(lint,x,n);vin(lint,y,m);
	//rep(n)x[i]+=1e9;rep(m)y[i]+=1e9;
	rep(n-1){
		cur+=x[n-i-1]-x[i]+md;cur%=md;
		xs+=cur;xs%=md;
	}cur=0;
	rep(m-1){
		cur+=y[m-i-1]-y[i]+md;cur%=md;
		ys+=cur;ys%=md;
	}lint ans=(xs*ys)%md;
	cout<<ans<<endl;
}


#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
 #define int long long

#define all(X) (X).begin(), (X).end()
#define reset(X) memset(X, 0, sizeof(X))
#define mp(a, b) make_pair(a, b)
#define pb push_back
#define endl '\n'
#define fi first
#define se second


using namespace __gnu_pbds;
using namespace std;
const int mod=1e9+7;
 // const int mod=998244353;
 // const int mod=1e9+9;
// const int INF=4e18+10;
const int INF=4e18+10;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define read(n) int n; cin>>n;
#define readv(x, n) vector<int> x(n); for(auto &i:x) cin>>i;


typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;

template<typename T1,typename T2>
void set_min(T1& a, T2 b)
{
    a=min(a, (T1)b);
}


int multiply(int a, int b, int in_mod){return (a*b)%in_mod;}
int mult_identity(int a){return 1;}


auto power(auto a, int b, int in_mod)
{
    auto prod=mult_identity(a);
    auto mult=a%in_mod;
    while(b!=0)
    {
        if(b%2)
        {
            prod=multiply(prod,mult, in_mod);

        }
        mult=multiply(mult, mult,in_mod);
        b/=2;
    }
    return prod;
}
int mod_inv(int q, int in_mod)
{

    return power(q, in_mod-2,in_mod);
}



void solve()
{
    int n, m;
    cin>>n>>m;
    vector<int> x, y;
    for(int i=0;i<n;i++)
    {
        int b;
        cin>>b;
        x.pb(b);
    } 
    for(int i=0;i<m;i++)
    {
        int b;
        cin>>b;
        y.pb(b);
    } 

    sort(all(x));
    sort(all(y));

    int ans=0;
    //precomputer the vector;
    int vec=0;
    for(int i=1;i<n;i++)
    {
        vec += i*(n-i)%mod * (x[i]-x[i-1]);
        vec%=mod;
    }
    for(int i=1;i<m;i++)
    {
        ans += i*(m-i)%mod *vec%mod * (y[i]-y[i-1]); 
        ans%=mod;

    }
    cout<<ans<<endl;
}

signed main()

{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    #ifndef ONLINE_JUDGE
    if(fopen("INPUT.txt","r"))
    {
        freopen ("INPUT.txt" , "r" , stdin);
        freopen ("OUTPUT.txt" , "w" , stdout);
    }
    #endif
    auto clk=clock();
    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
    // -------------------------------------Code starts here---------------------------------------------------------------------

    int t=1;
    // cin>>t;
    for(int test=1;test<=t;test++)
    {
        // cout<<"Case #"<<test<<": ";
        // cout<<endl;
        solve();
        // cout<<endl;

    }

    // -------------------------------------Code ends here------------------------------------------------------------------


    clk = clock() - clk;
    cerr << fixed << setprecision(6) << "Time: " << ((double)clk)/CLOCKS_PER_SEC << "\n";
    return 0;
}
