Xiao Ming participates in a mathematics competition. There are 20 questions in total. If he answers a question correctly, he will get 5 points. If he answers a wrong question or does not answer a question, 3 points will be deducted. Xiao Ming will get 76 points. How many questions does Xiao Ming answer correctly?
小明参加数学竞赛，共20道题，答对一题得5分，答错一题或不答倒扣3分，小明得76分，问小明答对几题？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

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

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

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

<gadget id="calculator">20 - 3</gadget>
<output>17</output>

<result>17</result>