Let's divide 81124172 by 4
We want to figure out the number of times 81124172 can be divided by 4.

Going ahead to step 1:
4 can be fit into 8 2 times, resulting in a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 8 from 8 to get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 4

Going ahead to step 2:
If we divide 1 by 4, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 20.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 4

Moving on to step 3:
The number 4 fits into 11 2 times, leaving a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 202.0
Deduct 8 from 11 and we're left with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 4

Step 4:
The number 4 fits into 32 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 2028.0
Deduct 32 from 32 and we're left with 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 4

Step 5:
4 can be fit into 4 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 20281.0
If we take 4 away from 4, we end up with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 4

Going ahead to step 6:
1 divided by 4 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 202810.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 4

Moving on to step 7:
When dividing 17 by 4, we get 4 with a remainder of 1.
The next digit of our result is 4. 
Result so far: 2028104.0
Subtracting 16 from 17 leaves us with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 4

Moving on to step 8:
The number 4 fits into 12 3 times, leaving a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 20281043.0
If we take 12 away from 12, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
When dividing 0 by 4, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20281043.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
When dividing 0 by 4, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20281043.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 20281043.0 with a remainder of 0.0.