After Mr. Liu brought 600 yuan to buy 15 copies of the same fairy tale book, there was 30 yuan left. How much is each fairy tale book?
刘老师带了600元买了15本同样的童话书后，还剩30元，每本童话书多少元？
<gadget id="calculator">600 - 30</gadget>
<output>570</output>

<gadget id="calculator">570 / 15</gadget>
<output>38</output>

<result>38</result>