Tao Tao weighed 3.25 kg at birth and 8.25 kg after 4 months. How many kilograms does Taotao's weight increase every month on average?
淘淘出生时体重是3.25千克，4个月后体重是8.25千克．淘淘的体重平均每个月增长多少千克？
<gadget id="calculator">8.25 - 3.25</gadget>
<output>5</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>