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The answer is 2,800. To estimate the product of 2 numbers, you round to the nearest ten or hundred. In this case, you would round 73 to 70, and 403 to 400, to make it easy to multiply. 70 x 400 = 2,800
25x80 < 28x87 < 30x90 --> 2000 < 28x87 < 2700?
3 x 29 = 87
The closest estimate for the product of 2 x 19 x 5 equals 200.
13 x 31 = 403