20% of a number is 100, what is 35% of this number?
一个数的20%是100，这个数的35%是多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 / (1/5)</gadget>
<output>500</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">500 * (7/20)</gadget>
<output>175</output>

<result>175</result>