It is impossible to tell since you have not bothered to give the measurement units. The answer for 48 inch x 48 inch x 18 inch will be quite different to 48 ft x 48 ft * 18 ft or some other units.
48*18=864
6000
1 gallon = 128 fluid ounces 48 fluid ounces = 48/128 gallon = 0.375 gallon
48
48 pints 1 gallon = 8 pints 1 pint = 0.12 gallon
There are 8 pints in a gallon. 48 1/6 pints in a gallon.
48 cups 1 gallon = 16 cups 1 cup = 0.06 Gallon
48 cups 1 gallon = 16 cups 1 cup = 0.06 gallon
18 goes into 100 how many times. Find this and divide by 48. or 1/18=48/100 18 times 48 divide by 100.
48 cups
48 cups 1 gallon = 16 cups 1 cup = 0.06 gallon
48 cups 1 gallon = 16 cups 1 cup = 0.06 Gallon