A number increased by 25% is 40, what is this number?
一个数增加它的25%是40，这个数是多少．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">40 / (5/4)</gadget>
<output>32</output>

<result>32</result>