The ratio of the number of people in classes A and B is 13:14. If one person is transferred from class B to class A, the number of people in the two classes will be equal. Find the sum of the number of people in the two classes.
甲、乙两班人数的比是13：14，若从乙班调1人去甲班，则两班人数相等．求两班的人数之和．
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">2 * 27</gadget>
<output>54</output>

<result>54</result>