The height of a trapezoid is 5 meters, and its area is 75 meters**2. What is the sum of the upper and lower bases of the trapezoid?
一个梯形的高是5米，它的面积是75米**2，这个梯形上底和下底的和是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">75 * (2/5)</gadget>
<output>30</output>

<result>30</result>