A fraction, the numerator is the sum of all prime numbers up to 10, and the denominator is the sum of all odd numbers up to 10, what is this fraction?
一个分数，分子是10以内所有质数的和，分母是10以内所有奇数的和，这个分数是多少．
<gadget id="calculator">2 + 3 + 5 + 7</gadget>
<output>17</output>

<gadget id="calculator">1 + 3 + 5 + 7 + 9</gadget>
<output>25</output>

<gadget id="calculator">17 / 25</gadget>
<output>17/25 = around 0.68</output>

<result>17/25 = around 0.68</result>