Alright, let's solve this problem step by step. We have 984308401 and 493107780 and we're adding them together.

Step 1: We'll start by adding the digits 1 & 0 in column 1 and get 1.

Step 2: We'll start by adding the digits 0 & 8 in column 2 and get 8.

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

Step 4: We'll start by adding the digits 8 & 7 in column 4 and get 16.
We'll write down the last digit 6 and carry the 1 to the next column.

Step 5: We'll start by adding the digits 0 & 0 in column 5 and get 1.

Step 6: We'll start by adding the digits 3 & 1 in column 6 and get 4.

Step 7: We'll start by adding the digits 4 & 3 in column 7 and get 7.

Step 8: We'll start by adding the digits 8 & 9 in column 8 and get 17.
We'll write down the last digit 7 and carry the 1 to the next column.

Step 9: We'll start by adding the digits 9 & 4 in column 9 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

So, 984308401 + 493107780 = 1477416181.

