The number that is 25% more than a number is 30. What is the number?
比一个数多25%的数是30，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">30 / (5/4)</gadget>
<output>24</output>

<result>24</result>