638479 divided by 13 
We're looking to find how many times 13 goes into 638479.

Step 1:
If we divide 6 by 13, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 13

Let's proceed to step 2:
If we divide 63 by 13, we get 4 and a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 52 from 63 and we're left with 11.
Take the next digit (8) from the dividend and append it to 11, then repeat: 118 / 13

Advancing to step 3:
13 can be fit into 118 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 49.0
Subtract 117 from 118 to get 1.
Append the next digit (4) from the dividend to 1 and continue with: 14 / 13

Advancing to step 4:
14 divided by 13 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 491.0
Deduct 13 from 14 and we're left with 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 13

Step 5:
13 can be fit into 17 1 times, resulting in a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 4911.0
Deduct 13 from 17 and we're left with 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 13

On to step 6:
If we divide 49 by 13, we get 3 and a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 49113.0
If we subtract 39 from 49, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
If we divide 100 by 13, we get 7 and a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 49113.7
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.

Let's proceed to step 8:
When dividing 90 by 13, we get 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 49113.76
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.

Advancing to step 9:
13 goes into 120 9 times with a remainder of 3.
The next digit of our result is 9. 
Result so far: 49113.769
Subtracting 117 from 120 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
13 goes into 30 2 times with a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 49113.7692
Subtracting 26 from 30 leaves us 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.

Moving on to step 11:
13 goes into 40 3 times with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 49113.76923
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
The number 13 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 49113.76923
Deduct 0 from 10 and we're left 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.

Moving on to step 13:
13 goes into 100 7 times with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 49113.7692307
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 14:
90 divided by 13 is 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 49113.76923076
If we subtract 78 from 90, we get 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 outcome is 49113.76923076, with a leftover of 1.2e-08.