We look at the division of 87312458 by 803 
Let's see how many times 803 fits into 87312458.

Moving on to step 1:
The number 803 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 803

Advancing to step 2:
803 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
If we subtract 0 from 87, we get 87.
Take the next digit (3) from the dividend and append it to 87, then repeat: 873 / 803

Going ahead to step 3:
When dividing 873 by 803, we get 1 with a remainder of 70.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 803 from 873 and we're left with 70.
Grab the next digit (1) from the dividend, add it to 70, then carry on: 701 / 803

Moving on to step 4:
803 can be fit into 701 0 times, resulting in a remainder of 701.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 701 to get 701.
Take the next digit (2) from the dividend and append it to 701, then repeat: 7012 / 803

Moving on to step 5:
803 can be fit into 7012 8 times, resulting in a remainder of 588.
Write down 8 as next digit of the result. 
Result so far: 108.0
Deduct 6424 from 7012 and we're left with 588.
Append the next digit (4) from the dividend to 588 and continue with: 5884 / 803

On to step 6:
803 can be fit into 5884 7 times, resulting in a remainder of 263.
The next digit of our result is 7. 
Result so far: 1087.0
Deduct 5621 from 5884 and we're left with 263.
Include the next digit (5) from the dividend after 263, then repeat: 2635 / 803

Let's proceed to step 7:
When dividing 2635 by 803, we get 3 with a remainder of 226.
The next digit of our result is 3. 
Result so far: 10873.0
Subtracting 2409 from 2635 leaves us with 226.
Fetch the next digit (8) from the dividend, attach it to 226 and continue: 2268 / 803

On to step 8:
If we divide 2268 by 803, we get 2 and a remainder of 662.
Write down 2 as next digit of the result. 
Result so far: 108732.0
Subtracting 1606 from 2268 leaves us with 662.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6620, and continue the process.

Going ahead to step 9:
6620 divided by 803 is 8 with a remainder of 196.
The next digit of our result is 8. 
Result so far: 108732.8
Deduct 6424 from 6620 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

On to step 10:
803 can be fit into 1960 2 times, resulting in a remainder of 354.
Use 2 as the next digit of our solution. 
Result so far: 108732.82
Deduct 1606 from 1960 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 11:
The number 803 fits into 3540 4 times, leaving a remainder of 328.
The next digit of our result is 4. 
Result so far: 108732.824
Subtract 3212 from 3540 to get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Advancing to step 12:
The number 803 fits into 3280 4 times, leaving a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 108732.8244
Subtracting 3212 from 3280 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

In conclusion, the division gives 108732.8244 with a balance of 0.00068.