Convert the units of capacity.
3 gal 2 qt 1 cup = __ fl oz
264
424
456
464
1 gallon = 128 fl oz
1 quart = 32 fl oz
1 cup = 8 fl oz
3 gal = 3 x 128 = 384 fl oz
2 qt = 2 x 32 = 64 fl oz
1 cup = 8 fl oz
Total = 384 + 64 + 8 = 456 fl oz
Therefore, 3 gal 2 qt 1 cup = 456 fl oz.
So, the answer is 456.