The grades of a certain school are divided into three categories: excellent, good, and passing. Among them, 25% are good and 40% are excellent. It is known that the number of excellent people is 60 more than the number of good people. How many people are there in this school?
某校成绩分为优、良、及格三类，其中25%为良，40%为优，已知优秀人数比良的人数多60个，这个学校一共有多少人？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 / (3/20)</gadget>
<output>400</output>

<result>400</result>