Zhang San saves 85 yuan of pocket money this semester, which is 13 yuan more than three times the pocket money of Wang Wu this semester. How much pocket money does Wang Wu save this semester?
张三本学期存零花钱85元，比王五本学期存的零花钱的3倍多13元，王五本学期存零花钱多少元？
<gadget id="calculator">85 - 13</gadget>
<output>72</output>

<gadget id="calculator">72 / 3</gadget>
<output>24</output>

<result>24</result>