A trapezoidal wheat field has an upper base of 20 meters, a lower base of 25 meters, and a height of 12 meters. If the investment is 60 yuan per square meter, how much does the land need to invest in total?
一块梯形麦田，上底是20米，下底是25米，高12米，如果每平方米投资60元，这块地一共需要投资多少钱？
<gadget id="calculator">20 + 25</gadget>
<output>45</output>

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

<gadget id="calculator">45 * 6</gadget>
<output>270</output>

<gadget id="calculator">270 * 60</gadget>
<output>16_200</output>

<result>16_200</result>