We divide 86639790 by 886
We want to figure out the number of times 86639790 can be divided by 886.

Let's proceed to step 1:
The number 886 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 886

Moving on to step 2:
86 divided by 886 is 0 with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 86 to get 86.
Bring next digit (6) of the dividend behind the 86 and repeat the process: 866 / 886

Advancing to step 3:
If we divide 866 by 886, we get 0 and a remainder of 866.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 866, we end up with 866.
Append the next digit (3) from the dividend to 866 and continue with: 8663 / 886

Let's proceed to step 4:
886 goes into 8663 9 times with a remainder of 689.
Write down 9 as next digit of the result. 
Result so far: 9.0
Deduct 7974 from 8663 and we're left with 689.
Include the next digit (9) from the dividend after 689, then repeat: 6899 / 886

Advancing to step 5:
886 can be fit into 6899 7 times, resulting in a remainder of 697.
Write down 7 as next digit of the result. 
Result so far: 97.0
Subtracting 6202 from 6899 leaves us with 697.
Append the next digit (7) from the dividend to 697 and continue with: 6977 / 886

On to step 6:
The number 886 fits into 6977 7 times, leaving a remainder of 775.
The number 7 becomes the next digit in our result. 
Result so far: 977.0
If we subtract 6202 from 6977, we get 775.
Append the next digit (9) from the dividend to 775 and continue with: 7759 / 886

Advancing to step 7:
886 can be fit into 7759 8 times, resulting in a remainder of 671.
The next digit of our result is 8. 
Result so far: 9778.0
Subtract 7088 from 7759 to get 671.
Bring next digit (0) of the dividend behind the 671 and repeat the process: 6710 / 886

Let's proceed to step 8:
The number 886 fits into 6710 7 times, leaving a remainder of 508.
The next digit of our result is 7. 
Result so far: 97787.0
Subtract 6202 from 6710 to get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

On to step 9:
5080 divided by 886 is 5 with a remainder of 650.
Use 5 as the next digit of our solution. 
Result so far: 97787.5
Deduct 4430 from 5080 and we're left with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

On to step 10:
If we divide 6500 by 886, we get 7 and a remainder of 298.
The next digit of our result is 7. 
Result so far: 97787.57
If we take 6202 away from 6500, we end up with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Going ahead to step 11:
When dividing 2980 by 886, we get 3 with a remainder of 322.
Use 3 as the next digit of our solution. 
Result so far: 97787.573
If we take 2658 away from 2980, we end up with 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Going ahead to step 12:
3220 divided by 886 is 3 with a remainder of 562.
Put 3 as the next digit of the answer. 
Result so far: 97787.5733
If we take 2658 away from 3220, we end up with 562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

The final result is 97787.5733 with a remainder of 0.00562.