Xiao Ming participated in a math competition and had to do 20 questions in total. 5 points are added for a correct answer, 3 points are deducted for an incorrect answer, and Xiao Ming's final score is 60 points. Q: How many questions did Xiao Ming get right?
小明参加数学比赛，总共要做20道题目．做对一道题目加5分，做错一道题目扣3分，小明最终得分是60分．问：小明做对了多少道题目？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

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

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

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

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<result>15</result>