We're dividing 42107557 by 823 
We want to figure out the number of times 42107557 can be divided by 823.

Going ahead to step 1:
823 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 823

Going ahead to step 2:
823 goes into 42 0 times with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 823

Going ahead to step 3:
823 can be fit into 421 0 times, resulting in a remainder of 421.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 421 and we're left with 421.
Grab the next digit (0) from the dividend, add it to 421, then carry on: 4210 / 823

Advancing to step 4:
823 can be fit into 4210 5 times, resulting in a remainder of 95.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 4115 from 4210, we get 95.
Grab the next digit (7) from the dividend, add it to 95, then carry on: 957 / 823

Moving on to step 5:
823 can be fit into 957 1 times, resulting in a remainder of 134.
The next digit of our result is 1. 
Result so far: 51.0
Subtracting 823 from 957 leaves us with 134.
Grab the next digit (5) from the dividend, add it to 134, then carry on: 1345 / 823

Step 6:
823 can be fit into 1345 1 times, resulting in a remainder of 522.
Record the quotient 1 as the next digit in the result. 
Result so far: 511.0
If we take 823 away from 1345, we end up with 522.
Take the next digit (5) from the dividend and append it to 522, then repeat: 5225 / 823

Step 7:
If we divide 5225 by 823, we get 6 and a remainder of 287.
Record the quotient 6 as the next digit in the result. 
Result so far: 5116.0
If we subtract 4938 from 5225, we get 287.
Include the next digit (7) from the dividend after 287, then repeat: 2877 / 823

Step 8:
823 can be fit into 2877 3 times, resulting in a remainder of 408.
The number 3 becomes the next digit in our result. 
Result so far: 51163.0
The remainder is 408 after subtracting 2469 from 2877.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Moving on to step 9:
823 goes into 4080 4 times with a remainder of 788.
The next digit of our result is 4. 
Result so far: 51163.4
Subtract 3292 from 4080 to get 788.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7880, and continue the process.

Advancing to step 10:
823 can be fit into 7880 9 times, resulting in a remainder of 473.
The next digit of our result is 9. 
Result so far: 51163.49
Subtracting 7407 from 7880 leaves us with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Going ahead to step 11:
823 goes into 4730 5 times with a remainder of 615.
Record the quotient 5 as the next digit in the result. 
Result so far: 51163.495
If we take 4115 away from 4730, we end up with 615.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

Let's proceed to step 12:
When dividing 6150 by 823, we get 7 with a remainder of 389.
Use 7 as the next digit of our solution. 
Result so far: 51163.4957
The remainder is 389 after subtracting 5761 from 6150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

On to step 13:
When dividing 3890 by 823, we get 4 with a remainder of 598.
Record the quotient 4 as the next digit in the result. 
Result so far: 51163.49574
If we subtract 3292 from 3890, we get 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

On to step 14:
823 can be fit into 5980 7 times, resulting in a remainder of 219.
Write down 7 as next digit of the result. 
Result so far: 51163.495747
Subtract 5761 from 5980 to get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Advancing to step 15:
823 goes into 2190 2 times with a remainder of 544.
The number 2 becomes the next digit in our result. 
Result so far: 51163.4957472
If we take 1646 away from 2190, we end up with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Advancing to step 16:
When dividing 5440 by 823, we get 6 with a remainder of 502.
The number 6 becomes the next digit in our result. 
Result so far: 51163.49574726
Subtracting 4938 from 5440 leaves us with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

The final result is 51163.49574726 with a remainder of 5.02e-07.