There are 36 students in a class. In a test, 25 people get the first question right, 23 people get the second question right, and 16 people get both questions right. How many people get neither of the two questions right?
某班36个同学，在一次测试中，答对第一题的有25人，答对第二题的有23人，两题都答对的有16人，那么两题都不对的有多少人．
<gadget id="calculator">23 - 16</gadget>
<output>7</output>

<gadget id="calculator">25 + 7</gadget>
<output>32</output>

<gadget id="calculator">36 - 32</gadget>
<output>4</output>

<result>4</result>