There are 45 people participating in a mathematics competition, 22 people get the first question right, 30 people get the second question right, 16 people get both questions right, and how many people get neither question right?
有45人参加数学竞赛，答对第一题的有22人，答对第二题的有30人，两题都答对的有16人，两题都没答对的有几人？
<gadget id="calculator">30 - 16</gadget>
<output>14</output>

<gadget id="calculator">22 + 14</gadget>
<output>36</output>

<gadget id="calculator">45 - 36</gadget>
<output>9</output>

<result>9</result>