We are presented with 3033402126 and 2425342463. Let's work out the sum.

Step 1: We'll start by adding the digits 6 & 3 in column 1 and get 9.

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

Step 3: We'll start by adding the digits 1 & 4 in column 3 and get 5.

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

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

Step 6: We'll start by adding the digits 4 & 3 in column 6 and get 7.

Step 7: We'll start by adding the digits 3 & 5 in column 7 and get 8.

Step 8: We'll start by adding the digits 3 & 2 in column 8 and get 5.

Step 9: We'll start by adding the digits 0 & 4 in column 9 and get 4.

Step 10: We'll start by adding the digits 3 & 2 in column 10 and get 5.

So, 3033402126 + 2425342463 = 5458744589.

