661273 divided by 81 
Let's see how many times 81 fits into 661273.

Let's proceed to step 1:
81 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 81

Step 2:
81 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (1) from the dividend and append it to 66, then repeat: 661 / 81

Step 3:
The number 81 fits into 661 8 times, leaving a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 8.0
If we subtract 648 from 661, we get 13.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 81

On to step 4:
The number 81 fits into 132 1 times, leaving a remainder of 51.
Use 1 as the next digit of our solution. 
Result so far: 81.0
Subtract 81 from 132 to get 51.
Append the next digit (7) from the dividend to 51 and continue with: 517 / 81

Advancing to step 5:
If we divide 517 by 81, we get 6 and a remainder of 31.
Write down 6 as next digit of the result. 
Result so far: 816.0
Subtracting 486 from 517 leaves us with 31.
Take the next digit (3) from the dividend and append it to 31, then repeat: 313 / 81

Step 6:
81 can be fit into 313 3 times, resulting in a remainder of 70.
The number 3 becomes the next digit in our result. 
Result so far: 8163.0
If we subtract 243 from 313, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
When dividing 700 by 81, we get 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 8163.8
Subtract 648 from 700 to 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 8:
81 goes into 520 6 times with a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 8163.86
Subtracting 486 from 520 leaves us 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 9:
When dividing 340 by 81, we get 4 with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 8163.864
Subtracting 324 from 340 leaves us with 16.
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 10:
81 goes into 160 1 times with a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 8163.8641
If we subtract 81 from 160, we get 79.
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 11:
When dividing 790 by 81, we get 9 with a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 8163.86419
Subtracting 729 from 790 leaves us 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.

Step 12:
When dividing 610 by 81, we get 7 with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 8163.864197
Deduct 567 from 610 and we're left with 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 13:
If we divide 430 by 81, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 8163.8641975
If we subtract 405 from 430, we 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.

Let's proceed to step 14:
81 goes into 250 3 times with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 8163.86419753
Deduct 243 from 250 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final result is 8163.86419753 with a remainder of 7e-09.