The number of boys in a class is 1.5 times the number of girls. The average height of boys is 1.65 meters, and the average height of the whole class is 1.59 meters. What is the average height of girls in this class?
某班男生人数是女生人数的1.5倍，男生的平均身高是1.65米，全班的平均身高是1.59米，这个班女生的平均身高是多少？
<gadget id="calculator">39.75 - 24.75</gadget>
<output>15</output>

<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

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