The area of the triangle is 6.2cm**2, the height is 3.1m, and the base is in centimeters.
三角形的面积是6.2cm**2，高是3.1米厘米，底是多少厘米．
<gadget id="calculator">2 / 3.1</gadget>
<output>0.645161</output>

<gadget id="calculator">6.2 * 0.645161</gadget>
<output>3.999998</output>

<result>3.999998</result>