Xiaoling goes to buy apples, and it costs 70 cents more to buy 5 kilograms, and 2 yuan, 2 cents and 2 cents to buy 6 kilograms. What is the price of apples per kilogram?
小玲去买苹果，买5千克还多7角8分，买6千克还差2元2角2分，苹果每千克价为多少元．
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">2 + (1/5) + (1/50)</gadget>
<output>111/50 = around 2.22</output>

<gadget id="calculator">0.78 + (111/50)</gadget>
<output>3</output>

<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<result>3</result>