For 3 batches of cookies, Gigi uses 3 * 2 = <<3*2=6>>6 cups of flour
The amount of flour remaining in the bag is 20 - 6 = <<20-6=14>>14 cups of flour
Since 1 batch uses 2 cups of flour, Gigi can make 14 / 2 = <<14/2=7>>7 more batches of cookies
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