In a certain buffet, each male guest paid 130 yuan, each female guest paid 100 yuan, and each brought a child paid 60 yuan. Now (1/3) adults each bring a child, and the total charge is 2160 yuan. How many people (adults and children) will attend the event?
某次自助餐，每一位男宾付130元，每一位女宾付100元，每带一个孩子付60元，现在(1/3)的成人各带一个孩子，总共收了2160元，这次活动共有多少人参加(成人和孩子)？
<gadget id="calculator">72 - 60</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">12 + 3 + 5</gadget>
<output>20</output>

<result>20</result>