(1/2) of a number is 75 more than 25% of this number, find this number.
一个数的(1/2)比这个数的25%多75，求这个数．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">75 / (1/4)</gadget>
<output>300</output>

<result>300</result>