There are 20 questions in a math contest, 5 points are awarded for each correct question, 3 points are deducted for each incorrect question, and Xiaohong scored 60 points in the test. How many questions did Xiaohong get wrong?
一次数学竞赛共20道题，做对一题得5分，做错一题扣3分，小红考了60分．小红做错了几道题？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

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

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<result>5</result>