639288 divided by 81 
We want to figure out the number of times 639288 can be divided by 81.

Let's proceed to step 1:
When dividing 6 by 81, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 81

Moving on to step 2:
When dividing 63 by 81, we get 0 with a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 81

Advancing to step 3:
81 goes into 639 7 times with a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 567 from 639, we get 72.
Include the next digit (2) from the dividend after 72, then repeat: 722 / 81

Let's proceed to step 4:
When dividing 722 by 81, we get 8 with a remainder of 74.
Use 8 as the next digit of our solution. 
Result so far: 78.0
The remainder is 74 after subtracting 648 from 722.
Grab the next digit (8) from the dividend, add it to 74, then carry on: 748 / 81

Step 5:
81 can be fit into 748 9 times, resulting in a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 789.0
If we subtract 729 from 748, we get 19.
Append the next digit (8) from the dividend to 19 and continue with: 198 / 81

Step 6:
When dividing 198 by 81, we get 2 with a remainder of 36.
The next digit of our result is 2. 
Result so far: 7892.0
Subtracting 162 from 198 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 7:
81 can be fit into 360 4 times, resulting in a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 7892.4
Subtracting 324 from 360 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 8:
360 divided by 81 is 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 7892.44
Subtracting 324 from 360 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The quotient of the division is 7892.44, and the remainder is 0.036.