Teacher Yuan's daughter weighed 3.24 kg at birth, and 9 kg after half a year. How many kilograms is the average monthly weight gain?
袁老师的女儿出生时体重是3.24千克，半年后体重是9千克．平均每月体重增长多少千克？
<gadget id="calculator">9 - 3.24</gadget>
<output>5.76</output>

<gadget id="calculator">5.76 / 6</gadget>
<output>0.96</output>

<result>0.96</result>