After giving (1/5) of the number of people in group A to group B, the number of the two groups is equal, how much more the original group A than group B
将A组人数的(1/5)给B组后，两组人数相等，原A组比B组多多少
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>