The students participated in environmental protection activities. There were 42 people in Class 1, and each person cleaned an average of 80 square meters of the environment. There were 38 people in Class 6 and 2, and a total of 2,800 square meters of environment was cleaned. How many square meters was cleaned by each person on average in the two classes?
同学们参加环保活动，六一班42人，平均每人清理环境80平方米，六二班38人，共清理环境2800平方米，两个班平均每人清理环境多少平方米？
<gadget id="calculator">80 * 38</gadget>
<output>3_040</output>

<gadget id="calculator">3_040 + 2_800</gadget>
<output>5_840</output>

<gadget id="calculator">42 + 38</gadget>
<output>80</output>

<gadget id="calculator">5_840 / 80</gadget>
<output>73</output>

<result>73</result>