There are 26 fourth-grade students participating in the chess interest group, which is 2 less than the calligraphy interest group (4/7). How many people participated in the calligraphy interest group? (column equation)
四年级学生参加象棋兴趣小组的人数有26人，比参加书法兴趣小组人数的(4/7)少2人．参加书法兴趣小组的多少人？(列方程)
<gadget id="calculator">2 + 26</gadget>
<output>28</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">28 / (4/7)</gadget>
<output>49</output>

<result>49</result>