If the number A is 3 times greater than the number B, then the number B is the number A and fill in the percentage.
甲数比乙数大3倍，则乙数是甲数的多少填百分数．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

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

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