Let's divide 63991700 by 518
We're looking to find how many times 518 goes into 63991700.

On to step 1:
518 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 518

Going ahead to step 2:
When dividing 63 by 518, we get 0 with a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 518

On to step 3:
518 goes into 639 1 times with a remainder of 121.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 518 away from 639, we end up with 121.
Grab the next digit (9) from the dividend, add it to 121, then carry on: 1219 / 518

Advancing to step 4:
1219 divided by 518 is 2 with a remainder of 183.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we subtract 1036 from 1219, we get 183.
Include the next digit (1) from the dividend after 183, then repeat: 1831 / 518

Let's proceed to step 5:
If we divide 1831 by 518, we get 3 and a remainder of 277.
The next digit of our result is 3. 
Result so far: 123.0
Subtracting 1554 from 1831 leaves us with 277.
Fetch the next digit (7) from the dividend, attach it to 277 and continue: 2777 / 518

Advancing to step 6:
When dividing 2777 by 518, we get 5 with a remainder of 187.
The number 5 becomes the next digit in our result. 
Result so far: 1235.0
The remainder is 187 after subtracting 2590 from 2777.
Grab the next digit (0) from the dividend, add it to 187, then carry on: 1870 / 518

Advancing to step 7:
When dividing 1870 by 518, we get 3 with a remainder of 316.
The next digit of our result is 3. 
Result so far: 12353.0
Deduct 1554 from 1870 and we're left with 316.
Fetch the next digit (0) from the dividend, attach it to 316 and continue: 3160 / 518

On to step 8:
518 goes into 3160 6 times with a remainder of 52.
The next digit of our result is 6. 
Result so far: 123536.0
Deduct 3108 from 3160 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 9:
520 divided by 518 is 1 with a remainder of 2.
The next digit of our result is 1. 
Result so far: 123536.1
Subtracting 518 from 520 leaves us 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.

Going ahead to step 10:
20 divided by 518 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 123536.1
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
The number 518 fits into 200 0 times, leaving a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 123536.1
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 123536.1 and a remainder of 0.02.