The school bought back 480 science and technology books, which is 25 less than the number of story books (5/6). How many story books did they buy back? (solution with equation)
学校买回科技书480本，比故事书的本数的(5/6)少25本，买回故事书多少本？(用方程解答)
<gadget id="calculator">25 + 480</gadget>
<output>505</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">505 / (5/6)</gadget>
<output>606</output>

<result>606</result>