At a party, 5 people drink coke, 6 people drink fruit juice, 4 people drink tea, 3 of them drink both juice and tea, how many people attend the party?
聚会时，有5人喝可乐，有6人喝果汁，有4人喝茶水，其中有3人既喝果汁又喝茶水，有多少人人参加聚会．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">5 + 6 + 1</gadget>
<output>12</output>

<result>12</result>