<human>:  Todd has $20. He buys 4 candy bars that cost $2 each. How much money in dollars does Todd have left?
<bot>: How much do the candy bars cost? ** The candy bars cost 4*2= $<<4*2=8>>8.
How much money does Todd have left? ** Todd has 20-8= $<<20-8=12>>12 left.
#### 12