If a is (5/7) of b, what is the ratio of b to a?
如果a是b的(5/7)，那么b和a的比值是多少．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 / (5/7)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>