We look at the division of 644793 by 13 
We want to figure out the number of times 644793 can be divided by 13.

Advancing to step 1:
6 divided by 13 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 13

Step 2:
If we divide 64 by 13, we get 4 and a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 12 after subtracting 52 from 64.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 13

Advancing to step 3:
If we divide 124 by 13, we get 9 and a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 49.0
If we take 117 away from 124, we end up with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 13

On to step 4:
13 goes into 77 5 times with a remainder of 12.
The next digit of our result is 5. 
Result so far: 495.0
The remainder is 12 after subtracting 65 from 77.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 13

Advancing to step 5:
When dividing 129 by 13, we get 9 with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 4959.0
Subtract 117 from 129 to get 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 13

Let's proceed to step 6:
13 can be fit into 123 9 times, resulting in a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 49599.0
If we take 117 away from 123, 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.

On to step 7:
If we divide 60 by 13, we get 4 and a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 49599.4
The remainder is 8 after subtracting 52 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
13 can be fit into 80 6 times, resulting in a remainder of 2.
The next digit of our result is 6. 
Result so far: 49599.46
If we subtract 78 from 80, we 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 9:
13 can be fit into 20 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 49599.461
Subtract 13 from 20 to 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 10:
13 goes into 70 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 49599.4615
Subtracting 65 from 70 leaves us 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.

Moving on to step 11:
13 goes into 50 3 times with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 49599.46153
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.

Advancing to step 12:
13 goes into 110 8 times with a remainder of 6.
The next digit of our result is 8. 
Result so far: 49599.461538
If we subtract 104 from 110, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 13:
13 goes into 60 4 times with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 49599.4615384
Deduct 52 from 60 and we're left with 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 14:
13 can be fit into 80 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 49599.46153846
If we take 78 away from 80, we end up 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.

The quotient of the division is 49599.46153846, and the remainder is 2e-09.