1.Just align the decimal horizontally.
ex.
0.25
0.50
2. Multiply it like how you multiply whole numbers. Don't mind the decimal
ex.
0.25
0.50
---------
01250
3. Now, count the decimal in your given. Just like my given the decimal place is 4, so you're gonna move the decimal from right to left. So that's how you multiply decimals.
Hope it helps.
