Aunt Wang bought 3 kilograms of bananas, and Uncle Li bought 3.6 kilograms of the same bananas. Aunt Wang and Uncle Li paid a total of 19.8 yuan. How much is a kilogram of bananas?
王阿姨买了3千克香蕉，李叔叔买了同样的香蕉3.6千克．王阿姨和李叔叔一共付了19.8元钱，每千克香蕉多少元？
<gadget id="calculator">3 + 3.6</gadget>
<output>6.6</output>

<gadget id="calculator">19.8 / 6.6</gadget>
<output>3</output>

<result>3</result>