The sum of half of number A and (1/3) of number B is 13, and the sum of (1/3) of number A and half of number B is 12. What is the sum of number A and number B?
甲数的一半与乙数的(1/3)的和为13，甲数的(1/3)与乙数的一半的和为12，则甲数与乙数之和为多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">25 / (5/6)</gadget>
<output>30</output>

<result>30</result>