There is a trapezoidal corn field, the upper base is 15 meters, the lower base is 25 meters, and the height is 20 meters. If 4.6 kilograms of corn can be harvested per square meter, how many kilograms of corn can be harvested in total?
有一块梯形的玉米地，它的上底是15米，下底是25米，高是20米，如果每平方米可以收获玉米4.6千克，一共可以收获玉米多少千克？
<gadget id="calculator">15 + 25</gadget>
<output>40</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">40 * 10 * 4.6</gadget>
<output>1_840</output>

<result>1_840</result>