Mom bought 4.5 kilograms of apples and 4 kilograms of bananas and spent a total of 37.5 yuan. Apples are 5 yuan per kilogram, and how much are bananas per kilogram?
妈妈买4.5千克苹果和4千克香蕉一共花了37.5元钱，苹果每千克5元，香蕉每千克多少钱？
<gadget id="calculator">5 * 4.5</gadget>
<output>22.5</output>

<gadget id="calculator">37.5 - 22.5</gadget>
<output>15</output>

<gadget id="calculator">15 / 4</gadget>
<output>15/4 = around 3.75</output>

<result>15/4 = around 3.75</result>