The area of a triangular traffic sign is 31.5 square decimeters, if its base is 8 decimeters, how many decimeters is its height?
一块三角形的交通标志牌的面积是31.5平方分米，如果它的底是8分米，它的高是多少分米？
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">31.5 * (1/4)</gadget>
<output>7.875</output>

<result>7.875</result>