The area of a trapezoid is 27 square centimeters, its upper base is 3.6 cm, and its lower base is 5.4 cm. What is its height?
一个梯形的面积是27平方厘米，它的上底是3.6厘米，下底是5.4厘米，它的高是多少．
<gadget id="calculator">3.6 + 5.4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">27 * (2/9)</gadget>
<output>6</output>

<result>6</result>