Class A has 33 students and Class B has 22 students. In an exam, the average score of Class A is 80 points, and the total average score of Class A and Class B is 82 points, find the average score of Class B.
甲班有33人，乙班有22人．在一次考试中，甲班的平均分是80分，甲班和乙班的总平均分是82分，求乙班的平均分．
<gadget id="calculator">33 + 22</gadget>
<output>55</output>

<gadget id="calculator">82 * 55</gadget>
<output>4_510</output>

<gadget id="calculator">80 * 33</gadget>
<output>2_640</output>

<gadget id="calculator">4_510 - 2_640</gadget>
<output>1_870</output>

<gadget id="calculator">1_870 / 22</gadget>
<output>85</output>

<result>85</result>