857903 ÷ 63 
Our goal is to divide 857903 by 63.

Moving on to step 1:
63 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 63

Going ahead to step 2:
The number 63 fits into 85 1 times, leaving a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 22 after subtracting 63 from 85.
Include the next digit (7) from the dividend after 22, then repeat: 227 / 63

Going ahead to step 3:
If we divide 227 by 63, we get 3 and a remainder of 38.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 189 away from 227, we end up with 38.
Fetch the next digit (9) from the dividend, attach it to 38 and continue: 389 / 63

Going ahead to step 4:
When dividing 389 by 63, we get 6 with a remainder of 11.
The next digit of our result is 6. 
Result so far: 136.0
Deduct 378 from 389 and we're left with 11.
Fetch the next digit (0) from the dividend, attach it to 11 and continue: 110 / 63

Advancing to step 5:
63 goes into 110 1 times with a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 1361.0
If we take 63 away from 110, we end up with 47.
Fetch the next digit (3) from the dividend, attach it to 47 and continue: 473 / 63

Step 6:
63 goes into 473 7 times with a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 13617.0
If we subtract 441 from 473, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 7:
63 goes into 320 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 13617.5
If we subtract 315 from 320, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
63 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 13617.5
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
The number 63 fits into 500 7 times, leaving a remainder of 59.
Write down 7 as next digit of the result. 
Result so far: 13617.507
Deduct 441 from 500 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 10:
63 can be fit into 590 9 times, resulting in a remainder of 23.
The number 9 becomes the next digit in our result. 
Result so far: 13617.5079
If we subtract 567 from 590, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 11:
63 can be fit into 230 3 times, resulting in a remainder of 41.
Put 3 as the next digit of the answer. 
Result so far: 13617.50793
Deduct 189 from 230 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 12:
410 divided by 63 is 6 with a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 13617.507936
Deduct 378 from 410 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
63 goes into 320 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 13617.5079365
The remainder is 5 after subtracting 315 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 14:
When dividing 50 by 63, we get 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 13617.5079365
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 13617.5079365, with a leftover of 5e-08.