<human>:  Zack's number of marbles can be divided equally among three people, leaving Zack with 5. If Zack decided to give his three friends 20 marbles each and kept five, how many marbles did he initially have?
<bot>: How many marbles did Zack give to his friends? ** If Zack decided to give his three friends 20 marbles each, he gave them 3*20=<<3*20=60>>60 marbles.
How many marbles did Zack initially have? ** If he kept five, Zack initially had 60+5=<<60+5=65>>65 marbles.
#### 65