(1/4) of a number is 25, what is 85% of this number?
一个数的(1/4)是25，这个数的85%是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">25 / (1/4)</gadget>
<output>100</output>

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">100 * (17/20)</gadget>
<output>85</output>

<result>85</result>