We've got two numbers: 203050352 and 3176645553. Let's find their sum.

Step 1: We'll start by adding the digits 2 & 3 in column 1 and get 5.

Step 2: We'll start by adding the digits 5 & 5 in column 2 and get 10.
We'll write down the last digit 0 and carry the 1 to the next column.

Step 3: We'll start by adding the digits 3 & 5 in column 3 and get 9.

Step 4: We'll start by adding the digits 0 & 5 in column 4 and get 5.

Step 5: We'll start by adding the digits 5 & 4 in column 5 and get 9.

Step 6: We'll start by adding the digits 0 & 6 in column 6 and get 6.

Step 7: We'll start by adding the digits 3 & 6 in column 7 and get 9.

Step 8: We'll start by adding the digits 0 & 7 in column 8 and get 7.

Step 9: We'll start by adding the digits 2 & 1 in column 9 and get 3.

Step 10: We'll start by adding the digits 0 & 3 in column 10 and get 3.

So, 203050352 + 3176645553 = 3379695905.

