Students repair books. Class 61 repaired 240 books, Class 62 repaired books from Class 61 (5/6), and Class 63 (4/5). How many books did Class Six and Three repair?
同学们修补图书．六一班修补了240本，六二班修补的本数是六一班的(5/6)，又是六三班的(4/5)．六三班修补了多少本？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/6) / (4/5)</gadget>
<output>25/24 = around 1.041667</output>

<gadget id="calculator">240 * (25/24)</gadget>
<output>250</output>

<result>250</result>