The sum of the upper and lower bases of a trapezoid is 12 meters, the area is 60 square meters, and the height is in meters.
一个梯形上、下底的和是12米，面积是60平方米，高是多少米．
<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">60 * (1/6)</gadget>
<output>10</output>

<result>10</result>