The area of a trapezoid is 288 square meters. Its upper base is 12 meters and its lower base is 24 meters. How high is it?
一块梯形地的面积是288平方米．它的上底是12米，下底是24米，高是多少米？
<gadget id="calculator">12 + 24</gadget>
<output>36</output>

<gadget id="calculator">2 / 36</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">288 * (1/18)</gadget>
<output>16</output>

<result>16</result>