813999 divided by 87 
Let's see how many times 87 fits into 813999.

Going ahead 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
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 87

On to step 2:
When dividing 81 by 87, we get 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Fetch the next digit (3) from the dividend, attach it to 81 and continue: 813 / 87

Let's proceed to step 3:
The number 87 fits into 813 9 times, leaving a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 783 from 813, we get 30.
Bring next digit (9) of the dividend behind the 30 and repeat the process: 309 / 87

Moving on to step 4:
When dividing 309 by 87, we get 3 with a remainder of 48.
Write down 3 as next digit of the result. 
Result so far: 93.0
If we take 261 away from 309, we end up with 48.
Grab the next digit (9) from the dividend, add it to 48, then carry on: 489 / 87

Moving on to step 5:
87 goes into 489 5 times with a remainder of 54.
Write down 5 as next digit of the result. 
Result so far: 935.0
Subtracting 435 from 489 leaves us with 54.
Bring next digit (9) of the dividend behind the 54 and repeat the process: 549 / 87

On to step 6:
549 divided by 87 is 6 with a remainder of 27.
Record the quotient 6 as the next digit in the result. 
Result so far: 9356.0
If we take 522 away from 549, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 7:
If we divide 270 by 87, we get 3 and a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 9356.3
Subtract 261 from 270 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
87 goes into 90 1 times with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 9356.31
Subtracting 87 from 90 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
87 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 9356.31
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
If we divide 300 by 87, we get 3 and a remainder of 39.
The next digit of our result is 3. 
Result so far: 9356.3103
If we take 261 away from 300, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 11:
87 can be fit into 390 4 times, resulting in a remainder of 42.
The next digit of our result is 4. 
Result so far: 9356.31034
The remainder is 42 after subtracting 348 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 12:
The number 87 fits into 420 4 times, leaving a remainder of 72.
Record the quotient 4 as the next digit in the result. 
Result so far: 9356.310344
Subtract 348 from 420 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final result is 9356.310344 with a remainder of 7.2e-06.