The students of the mathematics interest group of the animal school were going to have a picnic and prepared a total of 77 bowls. One rice bowl for one person, one vegetable bowl for two people, one soup bowl for four people. How many people participated in the picnic?
动物学校数学兴趣小组的学生要去野炊，一共准备了77个碗．一人一个饭碗，2人一个菜碗，4人一个汤碗．一共有多少人参加野炊．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 + (1/2) + (1/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">77 / (7/4)</gadget>
<output>44</output>

<result>44</result>