The upper base of a trapezoidal vegetable field is 12 meters, the lower base is 20 meters, and the height is 18 meters. 8 kg of radish can be received per square meter. How many kilograms of radishes can be harvested in this vegetable field?
一块梯形菜地的上底是12米，下底是20米，高是18米．每平方米可收萝卜8千克．这块菜地一共可收萝卜多少千克？
<gadget id="calculator">12 + 20</gadget>
<output>32</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">32 * 9 * 8</gadget>
<output>2_304</output>

<result>2_304</result>