After giving (1/5) of A's number to B's number, A and B are equal, and B's number is less than A's number.
把甲数的(1/5)给乙数后，甲、乙两数相等，乙数比甲数少它的多少．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>