6,1) There are 23 boys in the class with an average height of 155cm, and 27 girls with an average height of 157cm. What is the average height of the whole class in centimeters?
6,1)班有男生23人，平均身高155cm，有女生27人，平均身高157cm，全班同学的平均身高是多少厘米．
<gadget id="calculator">155 * 23</gadget>
<output>3_565</output>

<gadget id="calculator">157 * 27</gadget>
<output>4_239</output>

<gadget id="calculator">3_565 + 4_239</gadget>
<output>7_804</output>

<gadget id="calculator">23 + 27</gadget>
<output>50</output>

<gadget id="calculator">7_804 / 50</gadget>
<output>3_902/25 = around 156.08</output>

<result>3_902/25 = around 156.08</result>