No problem, let's work through this together. We're starting with 321920310 and are subtracting 299510144 from it.

Step 1: We'll start by subtracting the digit 4 and the borrow 0 from 0 in column 1 and get -4.
We add -4 to 10 and get 6 as the first digit of the result.

Step 2: We'll start by subtracting the digit 4 and the borrow 1 from 1 in column 2 and get -4.
We add -4 to 10 and get 6 as the next digit of the result.

Step 3: We'll start by subtracting the digit 1 and the borrow 1 from 3 in column 3 and get 1.
1 is the next digit of our result.

Step 4: We'll start by subtracting the digit 0 and the borrow 0 from 0 in column 4 and get 0.
0 is the next digit of our result.

Step 5: We'll start by subtracting the digit 1 and the borrow 0 from 2 in column 5 and get 1.
1 is the next digit of our result.

Step 6: We'll start by subtracting the digit 5 and the borrow 0 from 9 in column 6 and get 4.
4 is the next digit of our result.

Step 7: We'll start by subtracting the digit 9 and the borrow 0 from 1 in column 7 and get -8.
We add -8 to 10 and get 2 as the next digit of the result.

Step 8: We'll start by subtracting the digit 9 and the borrow 1 from 2 in column 8 and get -8.
We add -8 to 10 and get 2 as the next digit of the result.

Step 9: We'll start by subtracting the digit 2 and the borrow 1 from 3 in column 9 and get 0.
0 is the next digit of our result.

So, 321920310 - 299510144 = 22410166.