In fishery in one pond grew up 7 kg of a carp on 1 sq.m of the area of a pond and received 67200 kg of fish, and in other pond - 8 kg of a carp on 1 sq.m of the area and received 61600 kg of fish. On how many square meters the area of one pond is more than the area of another? (SHORT RECORD)

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1) 67200:7=9600 sq.m the area of the first pond 2) 61600:8=7700 sq.m the area of the second pond 3) 9600-7700=1900 sq.m the area of the first pond are more than the area of the second
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