The average height of the boys in Class 51 is 149 cm, the average height of the girls is 144 cm, and the average height of the whole class is 147 cm, then how many times the number of boys in this class is the number of girls.
五一班男生的平均身高是149厘米，女生的平均身高是144厘米，全班同学的平均身高是147厘米，则该班男生人数是女生人数的多少倍．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>