We divide 644631 by 5
Let's see how many times 5 fits into 644631.

Let's proceed to step 1:
If we divide 6 by 5, we get 1 and a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 5 away from 6, we end up with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 5

Step 2:
The number 5 fits into 14 2 times, leaving a remainder of 4.
The next digit of our result is 2. 
Result so far: 12.0
Deduct 10 from 14 and we're left with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 5

Advancing to step 3:
5 goes into 44 8 times with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 128.0
If we take 40 away from 44, we end up with 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 5

Let's proceed to step 4:
The number 5 fits into 46 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 1289.0
Deduct 45 from 46 and we're left with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 5

Advancing to step 5:
When dividing 13 by 5, we get 2 with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 12892.0
If we subtract 10 from 13, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 5

Moving on to step 6:
The number 5 fits into 31 6 times, leaving a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 128926.0
The remainder is 1 after subtracting 30 from 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
5 goes into 10 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 128926.2
If we take 10 away from 10, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
When dividing 0 by 5, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 128926.2
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
0 divided by 5 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 128926.2
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 128926.2, and the remainder is 0.0.