<human>:  A chef needs to make french fries. He can get 25 fries out of 1 potato. He has 15 potatoes and he needs 200 fries. How many potatoes will he have leftover?
<bot>: How many potatoes will he need? ** To make 200 fries he will need 200 / 25 fries per potato = <<200/25=8>>8 potatoes.
How many potatoes will he have left? ** He has 15 potatoes - 8 potatoes = <<15-8=7>>7 leftover potatoes.
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