The summer vacation is here, and our whole class will go rafting together. There will be 6 students on each rubber boat and 1 lifeguard. The rafting started. Xiaohua counted, and there were 63 people including the lifeguards. How many students participated in the rafting?
暑假到了，我们全班同学一起去漂流，每条橡皮艇上6名同学配1名救生员．漂流开始了，小华数了数，算上救生员一共有63人，一共有多少同学参加了漂流？
<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">63 * (6/7)</gadget>
<output>54</output>

<result>54</result>