42555123 ÷ 811 
We want to divide 42555123 by 811.

On to step 1:
The number 811 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 811

Advancing to step 2:
When dividing 42 by 811, we get 0 with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 811

Moving on to step 3:
811 goes into 425 0 times with a remainder of 425.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 425 to get 425.
Take the next digit (5) from the dividend and append it to 425, then repeat: 4255 / 811

Going ahead to step 4:
The number 811 fits into 4255 5 times, leaving a remainder of 200.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 4055 from 4255 and we're left with 200.
Append the next digit (5) from the dividend to 200 and continue with: 2005 / 811

Advancing to step 5:
811 can be fit into 2005 2 times, resulting in a remainder of 383.
The number 2 becomes the next digit in our result. 
Result so far: 52.0
If we take 1622 away from 2005, we end up with 383.
Grab the next digit (1) from the dividend, add it to 383, then carry on: 3831 / 811

On to step 6:
811 can be fit into 3831 4 times, resulting in a remainder of 587.
Use 4 as the next digit of our solution. 
Result so far: 524.0
If we take 3244 away from 3831, we end up with 587.
Grab the next digit (2) from the dividend, add it to 587, then carry on: 5872 / 811

On to step 7:
When dividing 5872 by 811, we get 7 with a remainder of 195.
Record the quotient 7 as the next digit in the result. 
Result so far: 5247.0
Subtract 5677 from 5872 to get 195.
Include the next digit (3) from the dividend after 195, then repeat: 1953 / 811

On to step 8:
When dividing 1953 by 811, we get 2 with a remainder of 331.
Record the quotient 2 as the next digit in the result. 
Result so far: 52472.0
The remainder is 331 after subtracting 1622 from 1953.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Step 9:
When dividing 3310 by 811, we get 4 with a remainder of 66.
Put 4 as the next digit of the answer. 
Result so far: 52472.4
The remainder is 66 after subtracting 3244 from 3310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 10:
The number 811 fits into 660 0 times, leaving a remainder of 660.
The number 0 becomes the next digit in our result. 
Result so far: 52472.4
If we subtract 0 from 660, we get 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

On to step 11:
6600 divided by 811 is 8 with a remainder of 112.
The number 8 becomes the next digit in our result. 
Result so far: 52472.408
Subtract 6488 from 6600 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 12:
The number 811 fits into 1120 1 times, leaving a remainder of 309.
Put 1 as the next digit of the answer. 
Result so far: 52472.4081
The remainder is 309 after subtracting 811 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Step 13:
811 can be fit into 3090 3 times, resulting in a remainder of 657.
Use 3 as the next digit of our solution. 
Result so far: 52472.40813
Deduct 2433 from 3090 and we're left with 657.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6570, and continue the process.

Going ahead to step 14:
811 goes into 6570 8 times with a remainder of 82.
The next digit of our result is 8. 
Result so far: 52472.408138
If we take 6488 away from 6570, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 15:
If we divide 820 by 811, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 52472.4081381
If we subtract 811 from 820, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 16:
811 can be fit into 90 0 times, resulting in a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 52472.4081381
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Our division results in 52472.4081381 with a remaining 9e-08.