In an office, there are 7 people who like to drink tea, 10 people like to drink coffee, and 3 people like to drink both tea and coffee. If everyone likes to drink at least one of tea or coffee, how many people in this office people?
在一个办公室中，有7个人爱喝茶，10个人爱喝咖啡，3个人既爱喝茶又爱喝咖啡，如果每个人都至少爱喝茶或咖啡中的一种，那么这个办公室里共有多少人？
<gadget id="calculator">10 - 3</gadget>
<output>7</output>

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

<result>14</result>