We can solve this together! We're beginning with 999954980 and removing 817613127 from it.

Step 1: We'll start by subtracting the digit 7 and the borrow 0 from 0 in column 1 and get -7.
We add -7 to 10 and get 3 as the first digit of the result.

Step 2: We'll start by subtracting the digit 2 and the borrow 1 from 8 in column 2 and get 5.
5 is the next digit of our result.

Step 3: We'll start by subtracting the digit 1 and the borrow 0 from 9 in column 3 and get 8.
8 is the next digit of our result.

Step 4: We'll start by subtracting the digit 3 and the borrow 0 from 4 in column 4 and get 1.
1 is the next digit of our result.

Step 5: We'll start by subtracting the digit 1 and the borrow 0 from 5 in column 5 and get 4.
4 is the next digit of our result.

Step 6: We'll start by subtracting the digit 6 and the borrow 0 from 9 in column 6 and get 3.
3 is the next digit of our result.

Step 7: We'll start by subtracting the digit 7 and the borrow 0 from 9 in column 7 and get 2.
2 is the next digit of our result.

Step 8: We'll start by subtracting the digit 1 and the borrow 0 from 9 in column 8 and get 8.
8 is the next digit of our result.

Step 9: We'll start by subtracting the digit 8 and the borrow 0 from 9 in column 9 and get 1.
1 is the next digit of our result.

So, 999954980 - 817613127 = 182341853.