Some students in a certain class go to a picnic, and every 1 person uses a rice bowl, every 2 people uses a vegetable bowl, and every 3 people use a soup bowl. In the end, they used 77 bowls in total. So how many students are participating in the picnic?
某班部分同学去野炊，每1人用一个饭碗，每2人用一个菜碗，每3人用一个汤碗．最后计算下来，他们一共要用77个碗．那么参加野炊的同学共多少人．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/2) + (1/3)</gadget>
<output>11/6 = around 1.833333</output>

<gadget id="calculator">77 / (11/6)</gadget>
<output>42</output>

<result>42</result>