The height of a trapezoid is 7 cm, the area is 24.5 cm2, what is the sum of the upper base and the lower base in cm?
一个梯形的高是7厘米，面积是24.5平方厘米，上底与下底的和是多少厘米．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">24.5 * (2/7)</gadget>
<output>7</output>

<result>7</result>