Give the step-by-step reasoning process and then the final answer. A farmer planted 30 rows of tomatoes with 10 plants in each row. Each tomato plant yields 20 pieces of tomatoes. How many pieces of tomatoes can the farmer get from all his planted tomatoes?
The farmer planted a total of 30 x 10 = 300 tomato plants. Thus, the farmer can get 300 x 20 = 6000 pieces of tomatoes.
The final answer: 6000.