Mom buys 4 kilograms of apples and 4 kilograms of pears, and the total cost is 28 yuan. Apple is 4.6 yuan per kilogram, how much is pear per kilogram?
妈妈买苹果和梨各4千克，一共用去28元．苹果每千克4.6元，梨每千克多少元？
<gadget id="calculator">4.6 * 4</gadget>
<output>18.4</output>

<gadget id="calculator">28 - 18.4</gadget>
<output>9.6</output>

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

<result>2.4</result>