The area of a trapezoid is 36 square centimeters, the sum of its upper and lower bases is 12 centimeters, what is its height in centimeters.
一个梯形的面积是36平方厘米，它的上下底的和为12厘米，它的高是多少厘米．
<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">36 * (1/6)</gadget>
<output>6</output>

<result>6</result>