Once you get your answer which is 615,448, you count how many places left the decimals go, then you add them both together, so 3.06 has two decimal places, and 2.008 has three, In total you have 5. Now you take your 614,448 and move your decimal from right to left five places...
Your answer is 6.14448
I’m sorry if this is confusing, I tried to put it as simply as possible, this is how I do it and it always works...