35 people in our class have subscribed to "Mathematics Kingdom", 18 people have subscribed to "Chinese World", and 9 of them have subscribed to both magazines. How many people are there in our class?
我们班有35人订了《数学王国》，有18人订了《语文天地》，其中有9人两种杂志都订了，我们班一共有多少人？
<gadget id="calculator">18 - 9</gadget>
<output>9</output>

<gadget id="calculator">35 + 9</gadget>
<output>44</output>

<result>44</result>