Mom goes to buy bananas, and you need to pay 18 yuan for 2.5 kilograms. How much is it per kilogram? (solution with equation)
妈妈去买香蕉，买2.5千克需要付18元，每千克多少钱？(用方程解答)
<gadget id="calculator">18 / 2.5</gadget>
<output>7.2</output>

<result>7.2</result>