The numerator of a fraction is the smallest composite number, and the denominator is the largest prime number within 10. What is the fraction?
一个分数的分子是最小的合数，分母是10以内的最大的质数，这个分数是多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>