After a number is increased by 60, it is 20% more than the original number, what is the original number?
一个数增加60后，比原来增加了20%，原数多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 / (1/5)</gadget>
<output>300</output>

<result>300</result>