666961 ÷ 81 
We want to divide 666961 by 81.

On to step 1:
If we divide 6 by 81, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 81

Step 2:
When dividing 66 by 81, we get 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (6) from the dividend, add it to 66, then carry on: 666 / 81

Moving on to step 3:
666 divided by 81 is 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 648 from 666, we get 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 81

Step 4:
81 can be fit into 189 2 times, resulting in a remainder of 27.
Use 2 as the next digit of our solution. 
Result so far: 82.0
The remainder is 27 after subtracting 162 from 189.
Grab the next digit (6) from the dividend, add it to 27, then carry on: 276 / 81

Going ahead to step 5:
81 can be fit into 276 3 times, resulting in a remainder of 33.
The number 3 becomes the next digit in our result. 
Result so far: 823.0
If we take 243 away from 276, we end up with 33.
Grab the next digit (1) from the dividend, add it to 33, then carry on: 331 / 81

Let's proceed to step 6:
81 goes into 331 4 times with a remainder of 7.
Write down 4 as next digit of the result. 
Result so far: 8234.0
If we subtract 324 from 331, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
The number 81 fits into 70 0 times, leaving a remainder of 70.
The next digit of our result is 0. 
Result so far: 8234.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 8:
81 goes into 700 8 times with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 8234.08
If we subtract 648 from 700, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 9:
81 goes into 520 6 times with a remainder of 34.
Put 6 as the next digit of the answer. 
Result so far: 8234.086
If we take 486 away from 520, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 10:
When dividing 340 by 81, we get 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 8234.0864
The remainder is 16 after subtracting 324 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 11:
160 divided by 81 is 1 with a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 8234.08641
The remainder is 79 after subtracting 81 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 12:
If we divide 790 by 81, we get 9 and a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 8234.086419
If we take 729 away from 790, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 13:
When dividing 610 by 81, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 8234.0864197
If we subtract 567 from 610, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 14:
81 can be fit into 430 5 times, resulting in a remainder of 25.
The next digit of our result is 5. 
Result so far: 8234.08641975
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Our division results in 8234.08641975 with a remaining 2.5e-08.