After A gives B (1/4) of his own money, and A and B have the same amount of money, how much of B's money accounts for A
甲把自己的钱的(1/4)给乙以后，甲、乙两人钱数相等，原来乙钱数占甲的多少
<gadget id="calculator">1 / 4</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>