The answer you are looking for is 27.8712.
In order to solve this problem, you must use PEMDAS. Since M (multiplying) comes before A (addition), so you'd multiply 6 and 3.1452 to get 18.8712. Next, you do the addition. 5 + 4 = 9 and 9 + 18.8712 = 27.8712.
I hope this helps!