Dan had $ 3 left with him after he bought a candy bar. If he had $ 4 at the start how much did the candy bar cost?
We can see that the store is selling the candy bars for $1.00 each. If we want to find out how much it would cost to buy two candy bars, we would need to multiply $1.00 by 2.

This means that it would cost $2.00 to buy two candy bars from the store.