If you need to round a number in a normal fashion (i.e. round values of 5 or more up and values less than 5 down) you can use the ROUND function with a specified number of digits.
This tutorials shows how to Round specific number in Excel.
In the example, the formula in cell D6 is
This tells Excel to take the value in B6 (PI) and round it to the number of digits in cell C6 (4) with a result of 3.1416
In the table, the ROUND function is used to round the same number (PI) to a decreasing number of digits, starting at 4 and moving down past zero to -1.
Notice that positive numbers round to the right of the decimal point, while digits specified less than or equal to zero round to the left.