There is a 50% chance of getting this result each time that you roll the die.  Here is why:

First, I am assuming that you are using only one die.  Second, I am assuming that the die has six sides and that the numbers on those sides are 1 through 6.

This means that each time that you roll the die, you get a 50% chance of getting a number greater than 3.  This is because 3 of the 6 sides die have numbers greater than 3.

Each time that you roll the die, you have the same probability of having a number higher than 3.  So each time you roll it, you have a 50% chance.

The regular die has 6 sides (1,2 , 3, 4 , 5, 6)

The outcomes for a number greater that 3 is (4,5 ,6)

Then, 3he probability of having a number greater that 3 the first time= 3/6= 1/2

The probability of having a number greater than 3 the second time = 3/6= 1/2

The probability of having a number greater that 3 both times is:

P = 1/2 * 1/2 = 1/4