Let's divide 945991 by 81
We want to figure out the number of times 945991 can be divided by 81.

Advancing to step 1:
81 can be fit into 9 0 times, resulting in a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (4) from the dividend and append it to 9, then repeat: 94 / 81

Step 2:
81 goes into 94 1 times with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 81 from 94 to get 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 81

Step 3:
If we divide 135 by 81, we get 1 and a remainder of 54.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 81 from 135 and we're left with 54.
Fetch the next digit (9) from the dividend, attach it to 54 and continue: 549 / 81

Step 4:
If we divide 549 by 81, we get 6 and a remainder of 63.
The number 6 becomes the next digit in our result. 
Result so far: 116.0
Deduct 486 from 549 and we're left with 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 81

Advancing to step 5:
639 divided by 81 is 7 with a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 1167.0
If we take 567 away from 639, we end up with 72.
Include the next digit (1) from the dividend after 72, then repeat: 721 / 81

On to step 6:
721 divided by 81 is 8 with a remainder of 73.
Use 8 as the next digit of our solution. 
Result so far: 11678.0
If we subtract 648 from 721, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 7:
81 goes into 730 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 11678.9
If we take 729 away from 730, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 8:
If we divide 10 by 81, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 11678.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
When dividing 100 by 81, we get 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 11678.901
Subtract 81 from 100 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 10:
81 can be fit into 190 2 times, resulting in a remainder of 28.
Record the quotient 2 as the next digit in the result. 
Result so far: 11678.9012
If we take 162 away from 190, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 11:
If we divide 280 by 81, we get 3 and a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 11678.90123
Deduct 243 from 280 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 12:
The number 81 fits into 370 4 times, leaving a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 11678.901234
If we take 324 away from 370, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 13:
If we divide 460 by 81, we get 5 and a remainder of 55.
The next digit of our result is 5. 
Result so far: 11678.9012345
The remainder is 55 after subtracting 405 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 14:
550 divided by 81 is 6 with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 11678.90123456
If we subtract 486 from 550, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Our division results in 11678.90123456 with a remaining 6.4e-08.