Formula of the Volume of a Pyramid is:

×Area of Base×Height of pyramid
V=

×3×4 (area of base=3 ft²)
V=4 ft³

and 3 cancels out.
He mails
(1000) x (the number of weeks he keeps it up)
of them.
Answer:
1/48 gallon of milk
Step-by-step explanation:
1/8 divided by 6 is equal to 1/8 x 1/6 because of keep, change, flip.
Keep the first number 1/8
Change the sign dividing turns into multiplying
Flip the number 6= 6/1 so flipping it turns it into 1/6
1/8 x 1/6 = 1/48
Step-by-step explanation:
To multiply the fractions, like

Multiply the top,
then multiply the bottom.

Try to use a calculator if you aren't arithmetic heavy, but I suggest you to try to remember them because they are going to be helpful for courses like Algebra, Calculus, Statistics, etc.
To divide fractions, like

You take the top number,

Then you flip the bottom number,

Then multiply the two

And that is your answer. Comment if you need more clarification