If the ratio of number A to number B is 0.2, what is the ratio of number B to number A?
甲数与乙数的比值是0.2，那么乙数与甲数的比值是多少．
<gadget id="calculator">0.2 / 1</gadget>
<output>0.2</output>

<gadget id="calculator">1 / 0.2</gadget>
<output>5</output>

<result>5</result>