simplest fraction ((a)/(b)) satisfies: (1/7)<((a)/(b))<(1/6), when the numerator a is the smallest 2, the sum of a and b is How many?
一个最简分数((a)/(b))满足：(1/7)＜((a)/(b))＜(1/6)，当分子a最小时2，a与b的和是多少？
<gadget id="calculator">2 + 13</gadget>
<output>15</output>

<result>15</result>