A and B are both non-zero numbers. If A is 25% of B, then B is the amount of A.
A、B是两个都不为零的数，如果A是B的25%，那么B是A的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<result>4</result>