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The product of 77 and 5 equals 385
5*7*11=385 5+7+11=23
Since 214 is a bit over 200, and 182 is a bit below 200, you could reasonably estimate them both as being 200 and therefore the sum of the two would be approximately 400. The actual sum is 396, which is very close to 400.
It is 385.
when both factors in a multiplication problem are rounded up to estimate the product, the estimate is an overestimate.