The area of a triangle is 5 square centimeters, the height is 4 centimeters, and the base is in centimeters.
一个三角形面积是5平方厘米，高是4厘米，底是多少厘米．
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 * (1/2)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>