A, B, and C have 60 books in total. A said: "My book is (1/2) of the total number of the two of them." C said: "My book is (1/3) of the total number of the two of them." Please find out based on the above information How many books does B have?
甲、乙、丙三人共有60本书．甲说："我的书是他们两人总本数的(1/2)．"丙说："我的书是他们两人总本数的(1/3)．"请根据以上的信息，求出乙有多少本书．
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">60 * (5/12)</gadget>
<output>25</output>

<result>25</result>