Li Qiang scored an average of 60 points in 5 subjects in the final exam. In order to make his grades look good, he changed his math score to 80 points, which increased his average score by 10 points. How much is Li Qiang's math score?
李强期末考试5门功课平均60分，为了使自己成绩好看，将数学分数改为80分，这样平均分就提高了10分，李强的数学到底多少分？
<gadget id="calculator">60 + 10</gadget>
<output>70</output>

<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">350 - 300</gadget>
<output>50</output>

<gadget id="calculator">80 - 50</gadget>
<output>30</output>

<result>30</result>