Assuming the die is six-sided.
That means the probability for rolling a 3 on the first is 1/6, and rolling a 3 on the second is also 1/6.
Multiply them together to get the probability of both rolling 3 consecutively.
1/6 x 1/6 = 1/36
In decimal form, this is 0.028 or 2.77%.
Hope this helps!