The area of a parallelogram is 2.4 square decimeters, the base is 20 centimeters, what is the height?
一个平行四边形的面积是2.4平方分米，底是20厘米，高是多少．
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<result>1.2</result>