Both the preceding term and the following term of (5/7) are enlarged by 3 times, what is the ratio
(5/7)的前项和后项都扩大3倍，比值是多少
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>