The number B is less than the number A (1/5), and the number A is more than the number B.
乙数比甲数少(1/5)，甲数比乙数多多少．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

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

<result>1/4 = around 0.25</result>