Sure thing! We've got 845413444 and 149893901, and we're going to subtract the second number from the first.

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

Step 2: We'll start by subtracting the digit 0 and the borrow 0 from 4 in column 2 and get 4.
4 is the next digit of our result.

Step 3: We'll start by subtracting the digit 9 and the borrow 0 from 4 in column 3 and get -5.
We add -5 to 10 and get 5 as the next digit of the result.

Step 4: We'll start by subtracting the digit 3 and the borrow 1 from 3 in column 4 and get -1.
We add -1 to 10 and get 9 as the next digit of the result.

Step 5: We'll start by subtracting the digit 9 and the borrow 1 from 1 in column 5 and get -9.
We add -9 to 10 and get 1 as the next digit of the result.

Step 6: We'll start by subtracting the digit 8 and the borrow 1 from 4 in column 6 and get -5.
We add -5 to 10 and get 5 as the next digit of the result.

Step 7: We'll start by subtracting the digit 9 and the borrow 1 from 5 in column 7 and get -5.
We add -5 to 10 and get 5 as the next digit of the result.

Step 8: We'll start by subtracting the digit 4 and the borrow 1 from 4 in column 8 and get -1.
We add -1 to 10 and get 9 as the next digit of the result.

Step 9: We'll start by subtracting the digit 1 and the borrow 1 from 8 in column 9 and get 6.
6 is the next digit of our result.

So, 845413444 - 149893901 = 695519543.