A total of 108 people in the fifth grade participated in rowing activities. They rented 12 large boats and 12 small boats. The boats were full every day, and the small boats took 3 people every day. How many people did each big boat take?
五年级共有108人参加划船活动，租大、小船各12条，每天船正好坐满，每天小船坐3人，每条大船坐多少人？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">108 - 36</gadget>
<output>72</output>

<gadget id="calculator">72 / 12</gadget>
<output>6</output>

<result>6</result>