We look at the division of 39191822 by 866 
Let's see how many times 866 fits into 39191822.

Advancing to step 1:
When dividing 3 by 866, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 866

Advancing to step 2:
39 divided by 866 is 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 866

Moving on to step 3:
391 divided by 866 is 0 with a remainder of 391.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 391 after subtracting 0 from 391.
Append the next digit (9) from the dividend to 391 and continue with: 3919 / 866

Going ahead to step 4:
866 can be fit into 3919 4 times, resulting in a remainder of 455.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 3464 from 3919 to get 455.
Grab the next digit (1) from the dividend, add it to 455, then carry on: 4551 / 866

Going ahead to step 5:
The number 866 fits into 4551 5 times, leaving a remainder of 221.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
Subtracting 4330 from 4551 leaves us with 221.
Include the next digit (8) from the dividend after 221, then repeat: 2218 / 866

Step 6:
When dividing 2218 by 866, we get 2 with a remainder of 486.
The next digit of our result is 2. 
Result so far: 452.0
Deduct 1732 from 2218 and we're left with 486.
Fetch the next digit (2) from the dividend, attach it to 486 and continue: 4862 / 866

Going ahead to step 7:
The number 866 fits into 4862 5 times, leaving a remainder of 532.
Write down 5 as next digit of the result. 
Result so far: 4525.0
If we subtract 4330 from 4862, we get 532.
Bring next digit (2) of the dividend behind the 532 and repeat the process: 5322 / 866

Going ahead to step 8:
866 goes into 5322 6 times with a remainder of 126.
Write down 6 as next digit of the result. 
Result so far: 45256.0
Deduct 5196 from 5322 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 9:
If we divide 1260 by 866, we get 1 and a remainder of 394.
Use 1 as the next digit of our solution. 
Result so far: 45256.1
If we subtract 866 from 1260, we get 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Step 10:
If we divide 3940 by 866, we get 4 and a remainder of 476.
Write down 4 as next digit of the result. 
Result so far: 45256.14
If we subtract 3464 from 3940, we get 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Going ahead to step 11:
If we divide 4760 by 866, we get 5 and a remainder of 430.
The next digit of our result is 5. 
Result so far: 45256.145
If we take 4330 away from 4760, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Moving on to step 12:
If we divide 4300 by 866, we get 4 and a remainder of 836.
The number 4 becomes the next digit in our result. 
Result so far: 45256.1454
Subtracting 3464 from 4300 leaves us with 836.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8360, and continue the process.

On to step 13:
When dividing 8360 by 866, we get 9 with a remainder of 566.
The number 9 becomes the next digit in our result. 
Result so far: 45256.14549
Deduct 7794 from 8360 and we're left with 566.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5660, and continue the process.

On to step 14:
The number 866 fits into 5660 6 times, leaving a remainder of 464.
Write down 6 as next digit of the result. 
Result so far: 45256.145496
If we subtract 5196 from 5660, we get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

On to step 15:
If we divide 4640 by 866, we get 5 and a remainder of 310.
The number 5 becomes the next digit in our result. 
Result so far: 45256.1454965
If we take 4330 away from 4640, we end up with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Moving on to step 16:
The number 866 fits into 3100 3 times, leaving a remainder of 502.
Put 3 as the next digit of the answer. 
Result so far: 45256.14549653
The remainder is 502 after subtracting 2598 from 3100.
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 outcome is 45256.14549653, with a leftover of 5.02e-07.