85222100 ÷ 866 
We want to figure out the number of times 85222100 can be divided by 866.

Let's proceed to step 1:
866 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 866

Step 2:
When dividing 85 by 866, we get 0 with a remainder of 85.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 85 after subtracting 0 from 85.
Include the next digit (2) from the dividend after 85, then repeat: 852 / 866

On to step 3:
When dividing 852 by 866, we get 0 with a remainder of 852.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 852, we get 852.
Append the next digit (2) from the dividend to 852 and continue with: 8522 / 866

Step 4:
866 goes into 8522 9 times with a remainder of 728.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 7794 away from 8522, we end up with 728.
Include the next digit (2) from the dividend after 728, then repeat: 7282 / 866

Moving on to step 5:
866 can be fit into 7282 8 times, resulting in a remainder of 354.
The next digit of our result is 8. 
Result so far: 98.0
The remainder is 354 after subtracting 6928 from 7282.
Take the next digit (1) from the dividend and append it to 354, then repeat: 3541 / 866

Going ahead to step 6:
If we divide 3541 by 866, we get 4 and a remainder of 77.
Put 4 as the next digit of the answer. 
Result so far: 984.0
Deduct 3464 from 3541 and we're left with 77.
Append the next digit (0) from the dividend to 77 and continue with: 770 / 866

Advancing to step 7:
The number 866 fits into 770 0 times, leaving a remainder of 770.
Write down 0 as next digit of the result. 
Result so far: 9840.0
Deduct 0 from 770 and we're left with 770.
Bring next digit (0) of the dividend behind the 770 and repeat the process: 7700 / 866

Step 8:
The number 866 fits into 7700 8 times, leaving a remainder of 772.
Write down 8 as next digit of the result. 
Result so far: 98408.0
The remainder is 772 after subtracting 6928 from 7700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7720, and continue the process.

Moving on to step 9:
When dividing 7720 by 866, we get 8 with a remainder of 792.
Record the quotient 8 as the next digit in the result. 
Result so far: 98408.8
If we subtract 6928 from 7720, we get 792.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7920, and continue the process.

Going ahead to step 10:
866 can be fit into 7920 9 times, resulting in a remainder of 126.
Use 9 as the next digit of our solution. 
Result so far: 98408.89
The remainder is 126 after subtracting 7794 from 7920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Step 11:
866 goes into 1260 1 times with a remainder of 394.
The number 1 becomes the next digit in our result. 
Result so far: 98408.891
The remainder is 394 after subtracting 866 from 1260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

Let's proceed to step 12:
3940 divided by 866 is 4 with a remainder of 476.
The next digit of our result is 4. 
Result so far: 98408.8914
Subtracting 3464 from 3940 leaves us with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Advancing to step 13:
If we divide 4760 by 866, we get 5 and a remainder of 430.
Use 5 as the next digit of our solution. 
Result so far: 98408.89145
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.

Going ahead to step 14:
4300 divided by 866 is 4 with a remainder of 836.
Use 4 as the next digit of our solution. 
Result so far: 98408.891454
Subtract 3464 from 4300 to get 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 15:
866 goes into 8360 9 times with a remainder of 566.
Put 9 as the next digit of the answer. 
Result so far: 98408.8914549
The remainder is 566 after subtracting 7794 from 8360.
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 16:
5660 divided by 866 is 6 with a remainder of 464.
The next digit of our result is 6. 
Result so far: 98408.89145496
If we take 5196 away from 5660, we end up with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Our division results in 98408.89145496 with a remaining 4.64e-07.