Let's divide 666438 by 81
We're looking to find how many times 81 goes into 666438.

Let's proceed to step 1:
81 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 81

Going ahead to step 2:
If we divide 66 by 81, we get 0 and a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 81

Moving on to step 3:
If we divide 666 by 81, we get 8 and a remainder of 18.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 648 from 666 leaves us with 18.
Include the next digit (4) from the dividend after 18, then repeat: 184 / 81

Moving on to step 4:
81 goes into 184 2 times with a remainder of 22.
The next digit of our result is 2. 
Result so far: 82.0
If we take 162 away from 184, we end up with 22.
Grab the next digit (3) from the dividend, add it to 22, then carry on: 223 / 81

Let's proceed to step 5:
If we divide 223 by 81, we get 2 and a remainder of 61.
The number 2 becomes the next digit in our result. 
Result so far: 822.0
The remainder is 61 after subtracting 162 from 223.
Bring next digit (8) of the dividend behind the 61 and repeat the process: 618 / 81

Step 6:
The number 81 fits into 618 7 times, leaving a remainder of 51.
The number 7 becomes the next digit in our result. 
Result so far: 8227.0
Deduct 567 from 618 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

On to step 7:
When dividing 510 by 81, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 8227.6
Deduct 486 from 510 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 8:
81 goes into 240 2 times with a remainder of 78.
The next digit of our result is 2. 
Result so far: 8227.62
Subtracting 162 from 240 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 9:
780 divided by 81 is 9 with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 8227.629
If we subtract 729 from 780, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 10:
81 goes into 510 6 times with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 8227.6296
Deduct 486 from 510 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
If we divide 240 by 81, we get 2 and a remainder of 78.
Use 2 as the next digit of our solution. 
Result so far: 8227.62962
Subtracting 162 from 240 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 12:
If we divide 780 by 81, we get 9 and a remainder of 51.
The next digit of our result is 9. 
Result so far: 8227.629629
If we subtract 729 from 780, we get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 13:
The number 81 fits into 510 6 times, leaving a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 8227.6296296
The remainder is 24 after subtracting 486 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
81 goes into 240 2 times with a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 8227.62962962
The remainder is 78 after subtracting 162 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

In conclusion, the division gives 8227.62962962 with a balance of 7.8e-08.