There is a trapezoidal vegetable field, the upper base is 13 meters long, the lower base is 27 meters long, and the height is 12 meters. If the income of vegetables per square meter is 10 kilograms, how many kilograms of vegetables will be collected in this vegetable field?
有一块梯形蔬菜地，上底长13米，下底长27米，高12米，如果每平方米蔬菜收入10千克，这块菜地收多少千克蔬菜？
<gadget id="calculator">13 + 27</gadget>
<output>40</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">40 * 6 * 10</gadget>
<output>2_400</output>

<result>2_400</result>