The ratio of boys to girls in Class 61 is 7:4, and there are 18 more boys than girls. How many people are there in Class 61?
六一班男生女生人数比是7：4，男生比女生多18人，六一班总共有多少人？
<gadget id="calculator">7 - 4</gadget>
<output>3</output>

<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<gadget id="calculator">6 * 11</gadget>
<output>66</output>

<result>66</result>