Class 61 students participated in the Olympic knowledge competition, among which 30 students won the prize, 2 people more than the whole class (7/15). What is the formula for calculating the class size
六1班同学参加奥运知识竞赛，其中有30名同学获奖，比全班人数的(7/15)多2人．计算全班人数的算式是多少
<gadget id="calculator">30 - 2</gadget>
<output>28</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">28 / (7/15)</gadget>
<output>60</output>

<result>60</result>