320 + 321 + 160 + 161 = 962
321 + 321 = 642
To estimate 321 x 33, you can round the numbers to make the multiplication simpler. Rounding 321 to 320 and 33 to 30 gives you 320 x 30. This equals 9600, which serves as a reasonable estimate for the original multiplication.
321 + 432 = 753
321
Well, darling, 555 plus 321 equals 876. It's simple math, honey, nothing to lose sleep over. Go ahead and impress your friends with your newfound knowledge of addition.
160.5
321 + 321 = 642
321 is an integer, so the closest integer would be 321. (If 321 itself doesn't count, 322 and 320 are the same distance from it, and are the next closest.)
-182 + 321 = 139
200 + 175 + 286 + 304 + 321 = 1,286
321 + 432 = 753
Each of these numbers will go evenly into 231: 1, 3, 7, 11, 21, 33, 77, 231.
123 + 321 = 444
Episode 321, I presume.
If you are rounding to the nearest tens, 320 is the answer. If you are rounding up to the nearest tens, 330 would be the answer. The difference is the word "up", which specifies that the answer will be greater than 321. The answer of 320 would be rounding down.
Most likely it's a Mossberg 321-320
976.