There are a total of 20 questions in the mathematics competition. If you get a question right, you will get 5 points, and if you get a wrong question, you will deduct 3 points. Xiao Ming's score in the competition is 76 points. How many questions did he get wrong?
数学竞赛共20道题，做对一题加5分，做错一题倒扣3分，小明的比赛成绩是76分，他做错了多少道题．
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">100 - 76</gadget>
<output>24</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<result>3</result>