If you buy 4 kilograms of bananas and 5 kilograms of pineapples, the price is 30.4 yuan. It is known that the price of bananas per kilogram is 3.8 yuan. How much is the price of pineapples per kilogram?
买4千克香蕉和5千克菠萝共用30.4元，已知每千克香蕉售价是3.8元，每千克菠萝的售价是多少元？
<gadget id="calculator">4 * 3.8</gadget>
<output>15.2</output>

<gadget id="calculator">30.4 - 15.2</gadget>
<output>15.2</output>

<gadget id="calculator">15.2 / 5</gadget>
<output>3.04</output>

<result>3.04</result>