We're dividing 13075421 by 866 
Let's see how many times 866 fits into 13075421.

Step 1:
866 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 866

Moving on to step 2:
866 can be fit into 13 0 times, resulting in a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 866

Advancing to step 3:
If we divide 130 by 866, we get 0 and a remainder of 130.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 130 and we're left with 130.
Append the next digit (7) from the dividend to 130 and continue with: 1307 / 866

Moving on to step 4:
If we divide 1307 by 866, we get 1 and a remainder of 441.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 441 after subtracting 866 from 1307.
Include the next digit (5) from the dividend after 441, then repeat: 4415 / 866

Let's proceed to step 5:
If we divide 4415 by 866, we get 5 and a remainder of 85.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 4330 from 4415 and we're left with 85.
Append the next digit (4) from the dividend to 85 and continue with: 854 / 866

Step 6:
When dividing 854 by 866, we get 0 with a remainder of 854.
Write down 0 as next digit of the result. 
Result so far: 150.0
Subtracting 0 from 854 leaves us with 854.
Append the next digit (2) from the dividend to 854 and continue with: 8542 / 866

Step 7:
866 can be fit into 8542 9 times, resulting in a remainder of 748.
The next digit of our result is 9. 
Result so far: 1509.0
If we subtract 7794 from 8542, we get 748.
Grab the next digit (1) from the dividend, add it to 748, then carry on: 7481 / 866

Let's proceed to step 8:
7481 divided by 866 is 8 with a remainder of 553.
Use 8 as the next digit of our solution. 
Result so far: 15098.0
If we take 6928 away from 7481, we end up with 553.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5530, and continue the process.

Going ahead to step 9:
If we divide 5530 by 866, we get 6 and a remainder of 334.
Record the quotient 6 as the next digit in the result. 
Result so far: 15098.6
Subtracting 5196 from 5530 leaves us with 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

On to step 10:
3340 divided by 866 is 3 with a remainder of 742.
Record the quotient 3 as the next digit in the result. 
Result so far: 15098.63
Deduct 2598 from 3340 and we're left with 742.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7420, and continue the process.

Going ahead to step 11:
If we divide 7420 by 866, we get 8 and a remainder of 492.
Put 8 as the next digit of the answer. 
Result so far: 15098.638
Deduct 6928 from 7420 and we're left with 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Going ahead to step 12:
If we divide 4920 by 866, we get 5 and a remainder of 590.
Put 5 as the next digit of the answer. 
Result so far: 15098.6385
Subtract 4330 from 4920 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 13:
When dividing 5900 by 866, we get 6 with a remainder of 704.
The number 6 becomes the next digit in our result. 
Result so far: 15098.63856
The remainder is 704 after subtracting 5196 from 5900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

On to step 14:
If we divide 7040 by 866, we get 8 and a remainder of 112.
Write down 8 as next digit of the result. 
Result so far: 15098.638568
Subtract 6928 from 7040 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.

On to step 15:
If we divide 1120 by 866, we get 1 and a remainder of 254.
The number 1 becomes the next digit in our result. 
Result so far: 15098.6385681
If we take 866 away from 1120, we end up with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

On to step 16:
866 can be fit into 2540 2 times, resulting in a remainder of 808.
Record the quotient 2 as the next digit in the result. 
Result so far: 15098.63856812
If we take 1732 away from 2540, we end up with 808.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8080, and continue the process.

The final result is 15098.63856812 with a remainder of 8.08e-07.