87790939 divided by 866 
Let's see how many times 866 fits into 87790939.

On to step 1:
The number 866 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 866

Advancing to step 2:
866 can be fit into 87 0 times, resulting in a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 87 to get 87.
Take the next digit (7) from the dividend and append it to 87, then repeat: 877 / 866

Let's proceed to step 3:
866 goes into 877 1 times with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 866 from 877, we get 11.
Include the next digit (9) from the dividend after 11, then repeat: 119 / 866

On to step 4:
When dividing 119 by 866, we get 0 with a remainder of 119.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 119 after subtracting 0 from 119.
Take the next digit (0) from the dividend and append it to 119, then repeat: 1190 / 866

Advancing to step 5:
The number 866 fits into 1190 1 times, leaving a remainder of 324.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 866 from 1190 leaves us with 324.
Fetch the next digit (9) from the dividend, attach it to 324 and continue: 3249 / 866

Let's proceed to step 6:
866 can be fit into 3249 3 times, resulting in a remainder of 651.
Put 3 as the next digit of the answer. 
Result so far: 1013.0
If we take 2598 away from 3249, we end up with 651.
Take the next digit (3) from the dividend and append it to 651, then repeat: 6513 / 866

Going ahead to step 7:
The number 866 fits into 6513 7 times, leaving a remainder of 451.
The number 7 becomes the next digit in our result. 
Result so far: 10137.0
Subtract 6062 from 6513 to get 451.
Include the next digit (9) from the dividend after 451, then repeat: 4519 / 866

Advancing to step 8:
If we divide 4519 by 866, we get 5 and a remainder of 189.
Record the quotient 5 as the next digit in the result. 
Result so far: 101375.0
Subtract 4330 from 4519 to get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Advancing to step 9:
When dividing 1890 by 866, we get 2 with a remainder of 158.
Put 2 as the next digit of the answer. 
Result so far: 101375.2
If we subtract 1732 from 1890, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Let's proceed to step 10:
When dividing 1580 by 866, we get 1 with a remainder of 714.
Record the quotient 1 as the next digit in the result. 
Result so far: 101375.21
Deduct 866 from 1580 and we're left with 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

Step 11:
The number 866 fits into 7140 8 times, leaving a remainder of 212.
The next digit of our result is 8. 
Result so far: 101375.218
If we take 6928 away from 7140, we end up with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Step 12:
2120 divided by 866 is 2 with a remainder of 388.
Put 2 as the next digit of the answer. 
Result so far: 101375.2182
If we subtract 1732 from 2120, we get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Moving on to step 13:
When dividing 3880 by 866, we get 4 with a remainder of 416.
Put 4 as the next digit of the answer. 
Result so far: 101375.21824
If we subtract 3464 from 3880, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Going ahead to step 14:
866 can be fit into 4160 4 times, resulting in a remainder of 696.
Record the quotient 4 as the next digit in the result. 
Result so far: 101375.218244
Deduct 3464 from 4160 and we're left with 696.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6960, and continue the process.

The quotient of the division is 101375.218244, and the remainder is 6.96e-05.