644891 ÷ 8 
We want to divide 644891 by 8.

Let's proceed to step 1:
8 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 8

Let's proceed to step 2:
When dividing 64 by 8, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 64 from 64, we get 0.
Bring next digit (4) of the dividend behind the 0 and repeat the process: 4 / 8

Going ahead to step 3:
If we divide 4 by 8, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 80.0
If we take 0 away from 4, we end up with 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 8

Let's proceed to step 4:
When dividing 48 by 8, we get 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 806.0
If we subtract 48 from 48, we get 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 8

Moving on to step 5:
8 can be fit into 9 1 times, resulting in a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 8061.0
The remainder is 1 after subtracting 8 from 9.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 8

Advancing to step 6:
8 goes into 11 1 times with a remainder of 3.
The next digit of our result is 1. 
Result so far: 80611.0
If we subtract 8 from 11, we 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.

Going ahead to step 7:
8 can be fit into 30 3 times, resulting in a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 80611.3
Subtracting 24 from 30 leaves us 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 8:
The number 8 fits into 60 7 times, leaving a remainder of 4.
The next digit of our result is 7. 
Result so far: 80611.37
Subtract 56 from 60 to get 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 9:
When dividing 40 by 8, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 80611.375
Subtract 40 from 40 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 10:
0 divided by 8 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 80611.375
If we take 0 away from 0, 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.

On to step 11:
When dividing 0 by 8, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 80611.375
If we take 0 away from 0, 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.

The quotient of the division is 80611.375, and the remainder is 0.0.