644832 ÷ 81 
We want to divide 644832 by 81.

Going ahead to step 1:
If we divide 6 by 81, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 81

Going ahead to step 2:
When dividing 64 by 81, we get 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Include the next digit (4) from the dividend after 64, then repeat: 644 / 81

Let's proceed to step 3:
81 goes into 644 7 times with a remainder of 77.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 567 away from 644, we end up with 77.
Take the next digit (8) from the dividend and append it to 77, then repeat: 778 / 81

Step 4:
81 goes into 778 9 times with a remainder of 49.
Record the quotient 9 as the next digit in the result. 
Result so far: 79.0
Subtracting 729 from 778 leaves us with 49.
Take the next digit (3) from the dividend and append it to 49, then repeat: 493 / 81

Advancing to step 5:
When dividing 493 by 81, we get 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 796.0
If we subtract 486 from 493, we get 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 81

Advancing to step 6:
The number 81 fits into 72 0 times, leaving a remainder of 72.
Record the quotient 0 as the next digit in the result. 
Result so far: 7960.0
If we take 0 away from 72, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 7:
The number 81 fits into 720 8 times, leaving a remainder of 72.
Record the quotient 8 as the next digit in the result. 
Result so far: 7960.8
Deduct 648 from 720 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 8:
720 divided by 81 is 8 with a remainder of 72.
Put 8 as the next digit of the answer. 
Result so far: 7960.88
If we take 648 away from 720, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

In conclusion, the division gives 7960.88 with a balance of 0.072.