We're dividing 63862991 by 13 
We want to divide 63862991 by 13.

On to step 1:
13 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 13

Step 2:
The number 13 fits into 63 4 times, leaving a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 52 away from 63, we end up with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 13

Step 3:
When dividing 118 by 13, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Subtracting 117 from 118 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 13

Step 4:
13 goes into 16 1 times with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 491.0
If we subtract 13 from 16, we get 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 13

On to step 5:
The number 13 fits into 32 2 times, leaving a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 4912.0
Deduct 26 from 32 and we're left with 6.
Grab the next digit (9) from the dividend, add it to 6, then carry on: 69 / 13

Going ahead to step 6:
13 can be fit into 69 5 times, resulting in a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 49125.0
Subtracting 65 from 69 leaves us with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 13

On to step 7:
13 can be fit into 49 3 times, resulting in a remainder of 10.
The next digit of our result is 3. 
Result so far: 491253.0
If we subtract 39 from 49, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 13

Moving on to step 8:
101 divided by 13 is 7 with a remainder of 10.
Put 7 as the next digit of the answer. 
Result so far: 4912537.0
Subtracting 91 from 101 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
100 divided by 13 is 7 with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 4912537.7
If we subtract 91 from 100, we 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.

Step 10:
13 can be fit into 90 6 times, resulting in a remainder of 12.
The next digit of our result is 6. 
Result so far: 4912537.76
If we take 78 away from 90, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 11:
13 goes into 120 9 times with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 4912537.769
The remainder is 3 after subtracting 117 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 12:
If we divide 30 by 13, we get 2 and a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 4912537.7692
Deduct 26 from 30 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 13:
When dividing 40 by 13, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 4912537.76923
The remainder is 1 after subtracting 39 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 14:
10 divided by 13 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 4912537.76923
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 15:
The number 13 fits into 100 7 times, leaving a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 4912537.7692307
Subtract 91 from 100 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.

On to step 16:
13 can be fit into 90 6 times, resulting in a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 4912537.76923076
Deduct 78 from 90 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 4912537.76923076 with a remainder of 1.2e-08.