639121 divided by 13 
We want to divide 639121 by 13.

Advancing to step 1:
6 divided by 13 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 13

On to step 2:
13 can be fit into 63 4 times, resulting in 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.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 13

Going ahead to step 3:
If we divide 119 by 13, we get 9 and a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 49.0
Deduct 117 from 119 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 13

Step 4:
If we divide 21 by 13, we get 1 and a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 491.0
Subtract 13 from 21 to get 8.
Append the next digit (2) from the dividend to 8 and continue with: 82 / 13

Going ahead to step 5:
The number 13 fits into 82 6 times, leaving a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 4916.0
If we take 78 away from 82, we end up with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 13

Moving on to step 6:
If we divide 41 by 13, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 49163.0
Subtract 39 from 41 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
13 can be fit into 20 1 times, resulting in a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 49163.1
If we subtract 13 from 20, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
70 divided by 13 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 49163.15
If we take 65 away from 70, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
50 divided by 13 is 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 49163.153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 10:
110 divided by 13 is 8 with a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 49163.1538
If we take 104 away from 110, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
The number 13 fits into 60 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 49163.15384
If we subtract 52 from 60, we get 8.
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 12:
When dividing 80 by 13, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 49163.153846
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 13:
If we divide 20 by 13, we get 1 and a remainder of 7.
The next digit of our result is 1. 
Result so far: 49163.1538461
If we subtract 13 from 20, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 14:
13 can be fit into 70 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 49163.15384615
If we subtract 65 from 70, 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.

In conclusion, the division gives 49163.15384615 with a balance of 5e-09.