Chad's cat food total was 6 packages * 9 cans = <<6*9=54>>54 cans of cat food.
Chad's dog food total was 2 packages * 3 cans = <<2*3=6>>6 cans of dog food.
Chad had 54 cans of cat food - 6 cans of dog food = <<54-6=48>>48 more cans of cat food.
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