First, we need to turn both mixed number fractions into improper fractions. (Fractions with a numerator being larger than the denominator)
2 3/4 = 11/4
1 5/6 = 11/6
11 * 11 = 121
4 * 6 = 24
= 121/24
Simplifying 121/24 . . .
121/24 = 5 1/24
5 1/24 is your final answer.
I hope this helps! :)