The shape of an orchard is trapezoid. Its upper base is 80 meters, its lower base is 100 meters, and its height is 20 meters. If the price per square meter is 12 yuan. So how much does this orchard cost?
一个果园的形状是梯形．它的上底是80米，下底是100米，高是20米．如果每平方米的价格是12元．那么这片果园需要多少钱？
<gadget id="calculator">80 + 100</gadget>
<output>180</output>

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

<gadget id="calculator">180 * 10 * 12</gadget>
<output>21_600</output>

<result>21_600</result>