The school held a small science and technology knowledge contest, and the scoring rules for rush-answer questions were 20 points for each correct answer, and 10 points for each wrong answer. Xiao Ming answered 8 questions in total and answered 5 questions correctly. What is his final score?
学校举行科技小知识竞赛，抢答题的评分规则是答对一题加20分，答错一题扣10分．小明一共抢答了8道题，答对了5道题，他最后得分是多少分
<gadget id="calculator">5 * 20</gadget>
<output>100</output>

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

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">100 - 30</gadget>
<output>70</output>

<result>70</result>