Depends on what the situation and number is. In generally, there can be as many digits as needed after a decimal point. The amount is infinity.
Move the decimal point three places to the right.
As there is no decimal point in your set of numbers it is impossible to round it to three decimal places.
You move the decimal point three places to the right.
Three. Count number of zeros. If multiply decimal by 100 move decimal point 2 places, etc.
The decimal point moves three places to the RIGHT.
It moves three places to the right.
Micrometres / 1000 = millimetres, move the decimal point three places to the left.
To the left of the decimal point, you place a decimal at an interval of every three digits.
Three. This refers to the number of significant digits AFTER the decimal point.
Exactly what you have when you just move the decimal point three places to the right from where it originally is.
You move it three places to the left.
It moves three places to the right.