A number (4/9) is 36, what is this number.
一个数的(4/9)是36，这个数是多少．
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">36 / (4/9)</gadget>
<output>81</output>

<result>81</result>