My mother bought 4 kilograms of pears and 5 kilograms of apples, and the share is 27.6 yuan, 3.6 yuan per kilogram of apples, how much is it per kilogram of pears?
妈妈买了4千克梨，5千克苹果，共用去27.6元，每千克苹果3.6元，每千克梨多少元？
<gadget id="calculator">3.6 * 5</gadget>
<output>18</output>

<gadget id="calculator">27.6 - 18</gadget>
<output>9.6</output>

<gadget id="calculator">9.6 / 4</gadget>
<output>2.4</output>

<result>2.4</result>