A trapezoidal cornfield has an upper base of 40 meters, a height of 50 meters and a height of 50 meters. The yield is 1.2 kilograms of corn per square meter. How many kilograms of corn does this property have?
一块梯形玉米地，上底40米，比下底短20米，高50米，每平方米产玉米1.2千克，这块地产玉米多少千克？
<gadget id="calculator">40 + 40 + 20</gadget>
<output>100</output>

<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">100 * 25 * 1.2</gadget>
<output>3_000</output>

<result>3_000</result>