Aunt Li bought 3 kilograms of apples and 2.5 kilograms of oranges at the fruit shop and spent a total of 36.7 yuan. Apples are 7.9 yuan per kilogram, how much are oranges per kilogram? (column equation solution)
李阿姨在水果店买了3千克苹果和2.5千克橘子共花了36.7元钱．苹果每千克7.9元，橘子每千克多少元？(列方程解答)
<gadget id="calculator">7.9 * 3</gadget>
<output>23.7</output>

<gadget id="calculator">36.7 - 23.7</gadget>
<output>13</output>

<gadget id="calculator">13 / 2.5</gadget>
<output>5.2</output>

<result>5.2</result>