Sixth graders are divided into groups to carry out publicity services in the community. There are 7 people in each group and 5 people in each group. 69 people just divided into 11 groups. How many groups are there?
六年级分小组到社区进行宣传服务，大组每组7人，小组每组5人．69人刚好分成了11组．有几个大组？
<gadget id="calculator">5 * 11</gadget>
<output>55</output>

<gadget id="calculator">69 - 55</gadget>
<output>14</output>

<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>