The area of a parallelogram is (5/9)m**2, the base is (5/2)m, what is its height?
一个平行四边形的面积是(5/9)m**2，底是(5/2)m，那么它的高是多少．
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/9) / (5/2)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>