Question 827907
How about in a lattice arrangement?


________________70______________4
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40____________2800____________160
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2_____________140_____________8
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You see the partial multiplications in the interior of the table.
The top line is the sum of numbers of 74, according to place value; and
the left column is the sum of numbers of 42, according to place value.


Next is to find the sum of each of the partial multiplications, which as said, are in the interior of the table.


{{{2800+160+140+8=highlight(3108)}}}