Mom bought 3 kilograms of apples and 3 kilograms of oranges from the supermarket, paid 20 yuan, got back 4.4 yuan, 4 yuan per kilogram of apples, how much per kilogram of oranges did mother buy?
妈妈从超市买回苹果和橘子各3千克，付出20元，找回4.4元，每千克苹果4元，那妈妈买的橘子每千克多少元？
<gadget id="calculator">20 - 4.4</gadget>
<output>15.6</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">15.6 - 12</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 / 3</gadget>
<output>1.2</output>

<result>1.2</result>