Xiaohua participated in the mathematics competition training, and the average score of the first and second exams was 60 points. Due to hard work, after the third exam, the average score of the first, second, and third exams was 70 points, so how much is the score of the third exam?
小华参加数学竞赛培训，第一、二次考试成绩平均60分，由于努力，第三次考试后，第一、二、三次的平均分为70分，那么第三次考试得多少分．
<gadget id="calculator">70 * 3</gadget>
<output>210</output>

<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<gadget id="calculator">210 - 120</gadget>
<output>90</output>

<result>90</result>