We've got two numbers: 6510041588 and 704047357. Let's find their sum.

Step 1: We'll start by adding the digits 8 & 7 in column 1 and get 15.
We'll write down the last digit 5 and carry the 1 to the next column.

Step 2: We'll start by adding the digits 8 & 5 in column 2 and get 14.
We'll write down the last digit 4 and carry the 1 to the next column.

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

Step 4: We'll start by adding the digits 1 & 7 in column 4 and get 8.

Step 5: We'll start by adding the digits 4 & 4 in column 5 and get 8.

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

Step 7: We'll start by adding the digits 0 & 4 in column 7 and get 4.

Step 8: We'll start by adding the digits 1 & 0 in column 8 and get 1.

Step 9: We'll start by adding the digits 5 & 7 in column 9 and get 12.
We'll write down the last digit 2 and carry the 1 to the next column.

Step 10: We'll start by adding the digits 6 & 0 in column 10 and get 7.

So, 6510041588 + 704047357 = 7214088945.

