There are 38 people in our class participating in the language group, 30 people participating in the mathematics group, and 10 people participating in both. How many people are there in our class?
我们班参加语文小组的有38人，参加数学小组的有30人，两项都参加的是10人，我们班有多少人？
<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">38 + 20</gadget>
<output>58</output>

<result>58</result>