The fifth grade students go on a spring outing. They cross the river by boat. If there are 5 people in a boat, there will be 2 more people. If there are 6 people in a boat, there will be 4 fewer people. If there are 7 people in a boat, there will be 5 fewer people. At least how many people in the fifth grade will participate in the spring outing?
五年级同学春游，他们乘船过河，如果5人一船则多2人，如果6人一船则少4人，如果7人一船则少5人，五年级至少有多少人参加春游？
<gadget id="calculator">5 * 6 * 7</gadget>
<output>210</output>

<gadget id="calculator">210 + 2</gadget>
<output>212</output>

<result>212</result>