Mr. John wants to buy winter apples Spartan. There are two ways to buy: 1) buy apples at the marketplace, where 1 kg costs 15 CZK. 2) Bring the car to the agricultural farm, where the apples are sold after 9 CZK per kilogram. However, he must pay CZK 150 for car gasoline. How many kilograms of apples would have Mr. John buy that for him to be more cost-effective to drive to the agricultural farm?
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