The denominator of a fraction is 65, and (2/5) is obtained after division. What is the numerator of this fraction?
一个分数的分母是65，经过约分后得(2/5)，则这个分数的分子是多少．
<gadget id="calculator">65 / 5</gadget>
<output>13</output>

<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<result>26</result>