A trapezoid with an area of 6.3m**2 and a height of 2.4m is the sum of the upper and lower bases in m.
一个面积是6.3m**2的梯形，高是2.4m，上底下底的和是多少m．
<gadget id="calculator">2 / 2.4</gadget>
<output>0.833333</output>

<gadget id="calculator">6.3 * 0.833333</gadget>
<output>5.249998</output>

<result>5.249998</result>