Xiaofang bought 2.5 kilograms of bananas and shared 9 yuan. How much is the average banana per kilogram?
小芳买了2.5千克香蕉，共用了9元钱，平均每千克香蕉多少元？
<gadget id="calculator">9 / 2.5</gadget>
<output>3.6</output>

<result>3.6</result>