Mom went to the fruit supermarket and bought 2.1 kilograms of apples and 2.1 kilograms of mangoes each. Apples cost 6.2 yuan per kilogram, and mother paid a total of 33.6 yuan. How much is mango per kilogram? (column equation solution)
妈妈去水果超市买了苹果和芒果各2.1千克，苹果每千克6.2元，妈妈一共付33.6元．芒果每千克多少钱？(列方程解答)
<gadget id="calculator">6.2 * 2.1</gadget>
<output>13.02</output>

<gadget id="calculator">33.6 - 13.02</gadget>
<output>20.58</output>

<gadget id="calculator">20.58 / 2.1</gadget>
<output>9.8</output>

<result>9.8</result>