Lele has 240 extracurricular books, story books account for 1/4 of them, and fairy tale books account for 1/3 of them. How many fairy tale books does Lele have?
乐乐的课外书有240本，故事书占了全部的(1/4)，童话故事书占了故事书的(1/3)，乐乐的童话故事书有多少本？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">240 * (1/4) * (1/3)</gadget>
<output>20</output>

<result>20</result>