What is the ratio of 5:7 after multiplying both the preceding term and the following term by 3
5：7的前项和后项都乘以3后，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>