Okay, we are given 6224283895 and 5442107891. Let's add them up step by step.

Step 1: We'll start by adding the digits 5 & 1 in column 1 and get 6.

Step 2: We'll start by adding the digits 9 & 9 in column 2 and get 18.
We'll write down the last digit 8 and carry the 1 to the next column.

Step 3: We'll start by adding the digits 8 & 8 in column 3 and get 17.
We'll write down the last digit 7 and carry the 1 to the next column.

Step 4: We'll start by adding the digits 3 & 7 in column 4 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

Step 5: We'll start by adding the digits 8 & 0 in column 5 and get 9.

Step 6: We'll start by adding the digits 2 & 1 in column 6 and get 3.

Step 7: We'll start by adding the digits 4 & 2 in column 7 and get 6.

Step 8: We'll start by adding the digits 2 & 4 in column 8 and get 6.

Step 9: We'll start by adding the digits 2 & 4 in column 9 and get 6.

Step 10: We'll start by adding the digits 6 & 5 in column 10 and get 11.
We'll write down the last digit 1 and carry the 1 to the next column.

So, 6224283895 + 5442107891 = 11666391786.

