The area of a trapezoid is 66 square meters, the lower base is 14 meters, and the height is 6 meters. What is the upper base of the trapezoid in meters?
一个梯形的面积是66平方米，下底是14米，高是6米，这个梯形的上底是多少米．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">66 * (1/3)</gadget>
<output>22</output>

<gadget id="calculator">22 - 14</gadget>
<output>8</output>

<result>8</result>