Mom went to the fruit shop to buy fruit. She took out 30 yuan, first spent 19.2 yuan to buy 4 kilograms of grapes, and then planned to use the remaining money to buy some oranges. If 1.2 yuan per kilogram of oranges, how many kilograms of oranges can my mother buy?
妈妈去水果店买水果．她拿出30元钱，先花19.2元买了4千克葡萄，然后准备用剩下的钱买一些橘子．如果每千克橘子1.2元，妈妈还可以买多少千克的橘子？
<gadget id="calculator">30 - 19.2</gadget>
<output>10.8</output>

<gadget id="calculator">10.8 / 1.2</gadget>
<output>9</output>

<result>9</result>