Let's divide 638987 by 81
We're looking to find how many times 81 goes into 638987.

Moving on to step 1:
81 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 81

On to step 2:
81 goes into 63 0 times with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 81

Let's proceed to step 3:
638 divided by 81 is 7 with a remainder of 71.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 71 after subtracting 567 from 638.
Append the next digit (9) from the dividend to 71 and continue with: 719 / 81

On to step 4:
When dividing 719 by 81, we get 8 with a remainder of 71.
Use 8 as the next digit of our solution. 
Result so far: 78.0
If we take 648 away from 719, we end up with 71.
Append the next digit (8) from the dividend to 71 and continue with: 718 / 81

Going ahead to step 5:
The number 81 fits into 718 8 times, leaving a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 788.0
If we take 648 away from 718, we end up with 70.
Take the next digit (7) from the dividend and append it to 70, then repeat: 707 / 81

Moving on to step 6:
81 can be fit into 707 8 times, resulting in a remainder of 59.
The number 8 becomes the next digit in our result. 
Result so far: 7888.0
The remainder is 59 after subtracting 648 from 707.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 7:
81 can be fit into 590 7 times, resulting in a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 7888.7
Subtract 567 from 590 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 8:
230 divided by 81 is 2 with a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 7888.72
Deduct 162 from 230 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 9:
81 goes into 680 8 times with a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 7888.728
If we take 648 away from 680, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 10:
81 goes into 320 3 times with a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 7888.7283
Subtracting 243 from 320 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 11:
When dividing 770 by 81, we get 9 with a remainder of 41.
The next digit of our result is 9. 
Result so far: 7888.72839
The remainder is 41 after subtracting 729 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 12:
410 divided by 81 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 7888.728395
The remainder is 5 after subtracting 405 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
When dividing 50 by 81, we get 0 with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 7888.728395
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 14:
The number 81 fits into 500 6 times, leaving a remainder of 14.
The next digit of our result is 6. 
Result so far: 7888.72839506
The remainder is 14 after subtracting 486 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 7888.72839506 with a balance of 1.4e-08.