2100 and 210
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700 and 210 are the answers to partial products of 77 times 30
They are: 30*50, 30*7, 6*50 and 6*7.
34 x 28 = 34 x (20 + 8) First partial product is: (30 + 4) x 8 = 240 + 32 Second partial product is: (30 + 4) x 20 = 600 + 80 Sum of partial products = total product = 600 + 240 + 80 + 32 = 952
6 x 80 = 480 6 x 5 = 30
It is: 7*500+7*30+7*4 = 3738