Math question regarding water

Question

If I have 5 gallons of water, how many 6oz bottles can that make?

Answer 1

128 fluid ounces= 1 gallon

128x5 = 640 ounces = 5 gall.

divide by 6

640/6 = 106 2/3 6 oz bottles with 5 gallons

but that's the US for "fluid"ounces

English Imperial gallon = 1.2 US gallong

and 16 dry ounces = 12 fluid ounces

so depending on what country you're in the answer will vary

in Britain, 5 Imperial gallons = 6 US gallons

divide 128(6) by 6 and you can get 128 6 fluid oz bottles

an Imperial fluid ounce= 1/160 of an Imperial gallon