There are 22 boys in a class with an average height of 140.5 cm; 18 girls with an average height of 143.5 cm. What is the average height of the class?
一个班有男生22人，平均身高140.5厘米；女生18人，平均身高143.5厘米．全班平均身高是多少？
<gadget id="calculator">140.5 * 22</gadget>
<output>3_091</output>

<gadget id="calculator">143.5 * 18</gadget>
<output>2_583</output>

<gadget id="calculator">3_091 + 2_583</gadget>
<output>5_674</output>

<gadget id="calculator">22 + 18</gadget>
<output>40</output>

<gadget id="calculator">5_674 / 40</gadget>
<output>2_837/20 = around 141.85</output>

<result>2_837/20 = around 141.85</result>