There are 240 middle-grade students in the school, and there are more senior-grade students than middle-grade students (1/6). How many seniors are there?
学校中年级有学生240人，高年级学生比中年级多(1/6)．高年级有多少人？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">240 * (7/6)</gadget>
<output>280</output>

<result>280</result>