81497856 ÷ 420 
We want to figure out the number of times 81497856 can be divided by 420.

Going ahead to step 1:
When dividing 8 by 420, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 420

Step 2:
420 can be fit into 81 0 times, resulting in a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Take the next digit (4) from the dividend and append it to 81, then repeat: 814 / 420

On to step 3:
When dividing 814 by 420, we get 1 with a remainder of 394.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 420 from 814 and we're left with 394.
Fetch the next digit (9) from the dividend, attach it to 394 and continue: 3949 / 420

Let's proceed to step 4:
The number 420 fits into 3949 9 times, leaving a remainder of 169.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 3780 from 3949 to get 169.
Append the next digit (7) from the dividend to 169 and continue with: 1697 / 420

Going ahead to step 5:
1697 divided by 420 is 4 with a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 194.0
If we take 1680 away from 1697, we end up with 17.
Grab the next digit (8) from the dividend, add it to 17, then carry on: 178 / 420

Advancing to step 6:
When dividing 178 by 420, we get 0 with a remainder of 178.
Write down 0 as next digit of the result. 
Result so far: 1940.0
Subtract 0 from 178 to get 178.
Grab the next digit (5) from the dividend, add it to 178, then carry on: 1785 / 420

Let's proceed to step 7:
If we divide 1785 by 420, we get 4 and a remainder of 105.
The number 4 becomes the next digit in our result. 
Result so far: 19404.0
If we take 1680 away from 1785, we end up with 105.
Bring next digit (6) of the dividend behind the 105 and repeat the process: 1056 / 420

Moving on to step 8:
1056 divided by 420 is 2 with a remainder of 216.
The next digit of our result is 2. 
Result so far: 194042.0
Subtracting 840 from 1056 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 9:
420 goes into 2160 5 times with a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 194042.5
Deduct 2100 from 2160 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 10:
When dividing 600 by 420, we get 1 with a remainder of 180.
The next digit of our result is 1. 
Result so far: 194042.51
Subtracting 420 from 600 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 11:
If we divide 1800 by 420, we get 4 and a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 194042.514
Subtract 1680 from 1800 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 12:
1200 divided by 420 is 2 with a remainder of 360.
The next digit of our result is 2. 
Result so far: 194042.5142
The remainder is 360 after subtracting 840 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Advancing to step 13:
When dividing 3600 by 420, we get 8 with a remainder of 240.
Write down 8 as next digit of the result. 
Result so far: 194042.51428
If we take 3360 away from 3600, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 14:
If we divide 2400 by 420, we get 5 and a remainder of 300.
Write down 5 as next digit of the result. 
Result so far: 194042.514285
If we take 2100 away from 2400, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Moving on to step 15:
If we divide 3000 by 420, we get 7 and a remainder of 60.
The next digit of our result is 7. 
Result so far: 194042.5142857
Subtracting 2940 from 3000 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 16:
420 can be fit into 600 1 times, resulting in a remainder of 180.
Record the quotient 1 as the next digit in the result. 
Result so far: 194042.51428571
The remainder is 180 after subtracting 420 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Our division results in 194042.51428571 with a remaining 1.8e-07.