We divide 644225 by 13
Let's see how many times 13 fits into 644225.

On to 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
Subtracting 0 from 6 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 13

Going ahead to step 2:
The number 13 fits into 64 4 times, leaving a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 12 after subtracting 52 from 64.
Include the next digit (4) from the dividend after 12, then repeat: 124 / 13

Advancing to step 3:
When dividing 124 by 13, we get 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
If we take 117 away from 124, we end up with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 13

On to step 4:
72 divided by 13 is 5 with a remainder of 7.
Record the quotient 5 as the next digit in the result. 
Result so far: 495.0
Subtracting 65 from 72 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 13

On to step 5:
The number 13 fits into 72 5 times, leaving a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 4955.0
Subtracting 65 from 72 leaves us with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 13

Advancing to step 6:
When dividing 75 by 13, we get 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 49555.0
Subtract 65 from 75 to 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.

Let's proceed to step 7:
13 goes into 100 7 times with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 49555.7
The remainder is 9 after subtracting 91 from 100.
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.
Write down 6 as next digit of the result. 
Result so far: 49555.76
Subtracting 78 from 90 leaves us 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.

Going ahead to step 9:
When dividing 120 by 13, we get 9 with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 49555.769
Subtract 117 from 120 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
30 divided by 13 is 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 49555.7692
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.

Let's proceed to step 11:
The number 13 fits into 40 3 times, leaving a remainder of 1.
The next digit of our result is 3. 
Result so far: 49555.76923
Subtract 39 from 40 to get 1.
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 12:
13 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 49555.76923
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
When dividing 100 by 13, we get 7 with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 49555.7692307
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.

Moving on to step 14:
13 goes into 90 6 times with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 49555.76923076
The remainder is 12 after subtracting 78 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 49555.76923076 and a remainder of 1.2e-08.