Mom went to the fruit shop to buy 4 kilograms of apples and 4 kilograms of bananas, which cost 56.2 yuan. It is known that an apple is 7.85 yuan per kilogram, how much is a banana per kilogram?
妈妈去水果店买回苹果和香蕉各4千克，用去了56.2元．已知苹果每千克7.85元，香蕉每千克多少元？
<gadget id="calculator">56.2 / 4</gadget>
<output>14.05</output>

<gadget id="calculator">14.05 - 7.85</gadget>
<output>6.2</output>

<result>6.2</result>