A certain school sent two teams (3 people in each team) to participate in the city's primary school Mathematical Olympiad. The average score of the first team is 75 points, and the average score of the second team is 81 points. What is the average score of the two teams?
某校派出两个队(每队3人)参加全市小学奥数竞赛．一队的平均分是75分，二队的平均分是81分．两个队的平均分是多少？
<gadget id="calculator">75 * 3</gadget>
<output>225</output>

<gadget id="calculator">81 * 3</gadget>
<output>243</output>

<gadget id="calculator">225 + 243</gadget>
<output>468</output>

<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">468 / 6</gadget>
<output>78</output>

<result>78</result>