The area of a parallelogram is (15/100) square meters, the base is 3 decimeters, and the height is in meters.
一个平形四边形的面积是(15/100)平方米，底是3分米，高是多少米．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">100 / 3 / 10</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(3/20) * (10/3)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>