We're dividing 17721066 by 866 
Our goal is to divide 17721066 by 866.

Advancing to step 1:
866 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 (7) from the dividend and append it to 1, then repeat: 17 / 866

Step 2:
866 can be fit into 17 0 times, resulting in a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Fetch the next digit (7) from the dividend, attach it to 17 and continue: 177 / 866

Step 3:
The number 866 fits into 177 0 times, leaving a remainder of 177.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 177 leaves us with 177.
Append the next digit (2) from the dividend to 177 and continue with: 1772 / 866

On to step 4:
If we divide 1772 by 866, we get 2 and a remainder of 40.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1732 from 1772, we get 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 866

Step 5:
When dividing 401 by 866, we get 0 with a remainder of 401.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 401 to get 401.
Bring next digit (0) of the dividend behind the 401 and repeat the process: 4010 / 866

Step 6:
866 goes into 4010 4 times with a remainder of 546.
Write down 4 as next digit of the result. 
Result so far: 204.0
Subtract 3464 from 4010 to get 546.
Append the next digit (6) from the dividend to 546 and continue with: 5466 / 866

Going ahead to step 7:
866 goes into 5466 6 times with a remainder of 270.
Use 6 as the next digit of our solution. 
Result so far: 2046.0
Deduct 5196 from 5466 and we're left with 270.
Bring next digit (6) of the dividend behind the 270 and repeat the process: 2706 / 866

Advancing to step 8:
When dividing 2706 by 866, we get 3 with a remainder of 108.
The next digit of our result is 3. 
Result so far: 20463.0
Subtract 2598 from 2706 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Going ahead to step 9:
When dividing 1080 by 866, we get 1 with a remainder of 214.
Put 1 as the next digit of the answer. 
Result so far: 20463.1
If we subtract 866 from 1080, we get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

On to step 10:
2140 divided by 866 is 2 with a remainder of 408.
The number 2 becomes the next digit in our result. 
Result so far: 20463.12
Subtract 1732 from 2140 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

On to step 11:
When dividing 4080 by 866, we get 4 with a remainder of 616.
The next digit of our result is 4. 
Result so far: 20463.124
Subtracting 3464 from 4080 leaves us with 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Moving on to step 12:
If we divide 6160 by 866, we get 7 and a remainder of 98.
The next digit of our result is 7. 
Result so far: 20463.1247
Subtract 6062 from 6160 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 13:
980 divided by 866 is 1 with a remainder of 114.
Use 1 as the next digit of our solution. 
Result so far: 20463.12471
Deduct 866 from 980 and we're left with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

On to step 14:
866 goes into 1140 1 times with a remainder of 274.
Use 1 as the next digit of our solution. 
Result so far: 20463.124711
Deduct 866 from 1140 and we're left with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

The final outcome is 20463.124711, with a leftover of 2.74e-05.