The upper base of a trapezoid is 8 decimeters, the height is 5 decimeters, the area is 35 square decimeters, and the lower base is how many decimeters.
一个梯形的上底是8分米，高是5分米，面积是35平方分米，下底是多少分米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">35 * (2/5)</gadget>
<output>14</output>

<gadget id="calculator">14 - 8</gadget>
<output>6</output>

<result>6</result>