81095574 ÷ 420 
We want to figure out the number of times 81095574 can be divided by 420.

Let's proceed to step 1:
If we divide 8 by 420, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 420

Advancing to step 2:
420 goes into 81 0 times with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Fetch the next digit (0) from the dividend, attach it to 81 and continue: 810 / 420

On to step 3:
810 divided by 420 is 1 with a remainder of 390.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 420 from 810 and we're left with 390.
Fetch the next digit (9) from the dividend, attach it to 390 and continue: 3909 / 420

Going ahead to step 4:
3909 divided by 420 is 9 with a remainder of 129.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
If we subtract 3780 from 3909, we get 129.
Append the next digit (5) from the dividend to 129 and continue with: 1295 / 420

Step 5:
The number 420 fits into 1295 3 times, leaving a remainder of 35.
Use 3 as the next digit of our solution. 
Result so far: 193.0
If we subtract 1260 from 1295, we get 35.
Include the next digit (5) from the dividend after 35, then repeat: 355 / 420

Moving on to step 6:
The number 420 fits into 355 0 times, leaving a remainder of 355.
Write down 0 as next digit of the result. 
Result so far: 1930.0
Subtracting 0 from 355 leaves us with 355.
Bring next digit (7) of the dividend behind the 355 and repeat the process: 3557 / 420

Step 7:
420 can be fit into 3557 8 times, resulting in a remainder of 197.
The next digit of our result is 8. 
Result so far: 19308.0
The remainder is 197 after subtracting 3360 from 3557.
Fetch the next digit (4) from the dividend, attach it to 197 and continue: 1974 / 420

On to step 8:
When dividing 1974 by 420, we get 4 with a remainder of 294.
Use 4 as the next digit of our solution. 
Result so far: 193084.0
Subtract 1680 from 1974 to get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

On to step 9:
When dividing 2940 by 420, we get 7 with a remainder of 0.
The next digit of our result is 7. 
Result so far: 193084.7
Subtracting 2940 from 2940 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.

Let's proceed to step 10:
420 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 193084.7
Deduct 0 from 0 and we're left 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.

On to step 11:
If we divide 0 by 420, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 193084.7
Subtract 0 from 0 to 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.

Our division results in 193084.7 with a remaining 0.0.