866573 ÷ 63 
Our goal is to divide 866573 by 63.

Let's proceed 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
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 63

Step 2:
If we divide 86 by 63, we get 1 and a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 23 after subtracting 63 from 86.
Grab the next digit (6) from the dividend, add it to 23, then carry on: 236 / 63

On to step 3:
The number 63 fits into 236 3 times, leaving a remainder of 47.
Use 3 as the next digit of our solution. 
Result so far: 13.0
The remainder is 47 after subtracting 189 from 236.
Include the next digit (5) from the dividend after 47, then repeat: 475 / 63

Step 4:
The number 63 fits into 475 7 times, leaving a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 137.0
Deduct 441 from 475 and we're left with 34.
Take the next digit (7) from the dividend and append it to 34, then repeat: 347 / 63

On to step 5:
63 can be fit into 347 5 times, resulting in a remainder of 32.
Record the quotient 5 as the next digit in the result. 
Result so far: 1375.0
Deduct 315 from 347 and we're left with 32.
Bring next digit (3) of the dividend behind the 32 and repeat the process: 323 / 63

Going ahead to step 6:
63 goes into 323 5 times with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 13755.0
Subtracting 315 from 323 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.

Going ahead to step 7:
63 can be fit into 80 1 times, resulting in a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 13755.1
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 8:
63 goes into 170 2 times with a remainder of 44.
Use 2 as the next digit of our solution. 
Result so far: 13755.12
The remainder is 44 after subtracting 126 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 9:
If we divide 440 by 63, we get 6 and a remainder of 62.
The next digit of our result is 6. 
Result so far: 13755.126
The remainder is 62 after subtracting 378 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 10:
When dividing 620 by 63, we get 9 with a remainder of 53.
The number 9 becomes the next digit in our result. 
Result so far: 13755.1269
Deduct 567 from 620 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 11:
63 goes into 530 8 times with a remainder of 26.
The next digit of our result is 8. 
Result so far: 13755.12698
If we take 504 away from 530, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 12:
63 can be fit into 260 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 13755.126984
The remainder is 8 after subtracting 252 from 260.
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 13:
63 can be fit into 80 1 times, resulting in a remainder of 17.
The next digit of our result is 1. 
Result so far: 13755.1269841
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 14:
63 can be fit into 170 2 times, resulting in a remainder of 44.
The next digit of our result is 2. 
Result so far: 13755.12698412
If we take 126 away from 170, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 13755.12698412, with a leftover of 4.4e-08.