The area of a parallelogram is 18m**2, its base is 4.5cm, and its height is m.
一个平行四边形的面积是18m**2，它的底是4.5cm，高是多少m．
<gadget id="calculator">4.5 / 100</gadget>
<output>0.045</output>

<gadget id="calculator">18 / 0.045</gadget>
<output>400</output>

<result>400</result>