Transfer (1/4) of the number of people in Class 61 to Class 62, and the number of people in the two classes is equal. The original number of people in Class 62 is the number of Class 61.
把六一班人数的(1/4)调入六二班，两班人数相等，原来六二班人数是六一班的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>