Give the step-by-step reasoning process and then the final answer. John buys 3 boxes of burritos. He gives away a 3rd of them to his friend. Each box has 20 burritos. He eats 3 burritos per day for 10 days. How many burritos does he have left?
He gave 3 / 3 = 1 box away. So he has 3 - 1 = 2 boxes. So he got 2 * 20 = 40 burritos. He ate 3 * 10 = 30 burritos. So he has 40 - 30 = 10 burritos left.
The final answer: 10.