The area of a trapezoid is 60 square meters, the height is 12 meters, the upper base is 3 meters, and the lower base is how many meters.
一个梯形的面积是60平方米，高12米，上底是3米，下底是多少米．
<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">10 - 3</gadget>
<output>7</output>

<result>7</result>