Let's divide 866399 by 87
We want to divide 866399 by 87.

Let's proceed to step 1:
If we divide 8 by 87, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 87

Going ahead to step 2:
If we divide 86 by 87, we get 0 and a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Bring next digit (6) of the dividend behind the 86 and repeat the process: 866 / 87

On to step 3:
87 can be fit into 866 9 times, resulting in a remainder of 83.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtracting 783 from 866 leaves us with 83.
Fetch the next digit (3) from the dividend, attach it to 83 and continue: 833 / 87

Moving on to step 4:
87 goes into 833 9 times with a remainder of 50.
Write down 9 as next digit of the result. 
Result so far: 99.0
If we subtract 783 from 833, we get 50.
Take the next digit (9) from the dividend and append it to 50, then repeat: 509 / 87

Going ahead to step 5:
87 can be fit into 509 5 times, resulting in a remainder of 74.
Put 5 as the next digit of the answer. 
Result so far: 995.0
If we subtract 435 from 509, we get 74.
Take the next digit (9) from the dividend and append it to 74, then repeat: 749 / 87

Step 6:
87 goes into 749 8 times with a remainder of 53.
The number 8 becomes the next digit in our result. 
Result so far: 9958.0
The remainder is 53 after subtracting 696 from 749.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 7:
When dividing 530 by 87, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 9958.6
Subtracting 522 from 530 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 8:
80 divided by 87 is 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 9958.6
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 9:
When dividing 800 by 87, we get 9 with a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 9958.609
The remainder is 17 after subtracting 783 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 10:
The number 87 fits into 170 1 times, leaving a remainder of 83.
Put 1 as the next digit of the answer. 
Result so far: 9958.6091
Subtract 87 from 170 to get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 11:
87 can be fit into 830 9 times, resulting in a remainder of 47.
Put 9 as the next digit of the answer. 
Result so far: 9958.60919
Subtracting 783 from 830 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 12:
If we divide 470 by 87, we get 5 and a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 9958.609195
Subtract 435 from 470 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 13:
The number 87 fits into 350 4 times, leaving a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 9958.6091954
If we take 348 away from 350, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
The number 87 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 9958.6091954
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 9958.6091954 with a balance of 2e-08.