Answer :

alexak
one tenth = 0.1

0.1 * 0.04

You do 1 * 4 = 4.0 and you move the decimal three spots to the left.

0.1 * 0.04 = 0.004
TSO
One tenth is equal to .1 or 1/10

and .04 is nothing but 4/100

So just multiply them together:

1/10 x 4/100 = 4/1000

And since there are 3 0's we need to move the decimal spot 3 places the the left:

.004

So our final answer is [tex]\sf{\boxed{.004}}[/tex]