The area of a right triangle is 18 square centimeters, the base is 9 centimeters, and the height is in centimeters.
一个直角三角形的面积是18平方厘米，底是9厘米，高多少厘米．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">18 * (2/9)</gadget>
<output>4</output>

<result>4</result>