(5/9) of a number is 20, what is (1/72) of this number?
一个数的(5/9)是20，这个数的(1/72)是多少？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">20 / (5/9)</gadget>
<output>36</output>

<gadget id="calculator">1 / 72</gadget>
<output>1/72 = around 0.013889</output>

<gadget id="calculator">36 * (1/72)</gadget>
<output>1/2 = around 0.5</output>

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