"September 1" primary school third graders went out for an outing with four kinds of beverages. After returning, they drank a total of 228 boxes of four kinds of beverages. On average, every 3 people drank a box of coconut juice, every 4 people drank a box of orange juice, and every 5 people drank a box of orange juice. Drink a box of apple juice, and every 6 people drink a box of pear juice, so how many students are there in the second grade of "September 1" primary school? (Please use the equation to solve)
"九一"小学三年级同学带有四种饮料外出郊游，回来后统计，共饮四种饮料228盒，平均每3人饮用一盒椰汁，每4人饮用一盒桔汁，每5人饮用一盒苹果汁，每6人饮用一盒梨汁，那么，"九一"小学二年级共有学生多少人？(请用方程解答)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/3) + (1/4) + (1/5) + (1/6)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">228 / (19/20)</gadget>
<output>240</output>

<result>240</result>