The area of a triangle is 18 cm, the base is 5 cm, and the height is in cm.
一个三角形的面积是18厘米，底是5厘米，高是多少厘米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">18 * (2/5)</gadget>
<output>36/5 = around 7.2</output>

<result>36/5 = around 7.2</result>