Multiply. In the US, one ton is 2000 pounds.
3 tons = 3 x 2000 = 6000 pounds
Divide
To change ounces to pounds you would multiply, because it's going from something small (ounces) to something big (pounds).
1 lb. = 16 oz. Multiply by 16.
You would multiply pounds by the ounces per pound.
A pound is equal to eight ounces, so you would multiply the number of pounds by eight to convert it to ounces.
divide
When changing ounces to pounds, you divide by 16. Example: 112 ounces in pounds. Divide 112 by 16 and you will get 7, so the answer is 7 pounds.
multiply.... by 3
You would divide to change fluid ounces to cups. For example, to convert 8 fluid ounces to cups, you would divide by 8 (1 cup = 8 fluid ounces), which would give you 1 cup.
You would divide quarts by '4' to find how many gallons.
10 mm = 1 cm Divide
4 cups = 1 quart Divide by 4