The number A is 25% of the number B. If the number A is 40, what is the number B?
甲数是乙数的25%，如果甲数是40，那么乙数是多少．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 / (1/4)</gadget>
<output>160</output>

<result>160</result>