We look at the division of 100420 by 81 
We want to figure out the number of times 100420 can be divided by 81.

Moving on to step 1:
81 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 81

Advancing to step 2:
81 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 10 leaves us with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 81

Moving on to step 3:
The number 81 fits into 100 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 81 away from 100, we end up with 19.
Bring next digit (4) of the dividend behind the 19 and repeat the process: 194 / 81

Step 4:
The number 81 fits into 194 2 times, leaving a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtracting 162 from 194 leaves us with 32.
Grab the next digit (2) from the dividend, add it to 32, then carry on: 322 / 81

On to step 5:
If we divide 322 by 81, we get 3 and a remainder of 79.
Write down 3 as next digit of the result. 
Result so far: 123.0
Subtracting 243 from 322 leaves us with 79.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 81

On to step 6:
81 goes into 790 9 times with a remainder of 61.
The next digit of our result is 9. 
Result so far: 1239.0
Subtract 729 from 790 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Advancing to step 7:
If we divide 610 by 81, we get 7 and a remainder of 43.
The next digit of our result is 7. 
Result so far: 1239.7
Deduct 567 from 610 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 8:
430 divided by 81 is 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 1239.75
Subtracting 405 from 430 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
250 divided by 81 is 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 1239.753
If we subtract 243 from 250, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 10:
When dividing 70 by 81, we get 0 with a remainder of 70.
The next digit of our result is 0. 
Result so far: 1239.753
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 11:
If we divide 700 by 81, we get 8 and a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 1239.75308
Subtract 648 from 700 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 12:
81 goes into 520 6 times with a remainder of 34.
The next digit of our result is 6. 
Result so far: 1239.753086
Deduct 486 from 520 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 13:
If we divide 340 by 81, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 1239.7530864
If we take 324 away from 340, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 14:
The number 81 fits into 160 1 times, leaving a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 1239.75308641
Subtracting 81 from 160 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The quotient of the division is 1239.75308641, and the remainder is 7.9e-08.