20% of a number is exactly 36. Find this number?
一个数的20%正好是36，求这个数？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">36 / (1/5)</gadget>
<output>180</output>

<result>180</result>