The area of a triangle is 45 square decimeters, the base is 5 decimeters, and the height is decimeters.
一个三角形的面积是45平方分米，底是5分米，高是多少分米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 * (2/5)</gadget>
<output>18</output>

<result>18</result>