We look at the division of 958399 by 81 
We're looking to find how many times 81 goes into 958399.

On to step 1:
When dividing 9 by 81, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 81

Moving on to step 2:
If we divide 95 by 81, we get 1 and a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 81 from 95 and we're left with 14.
Bring next digit (8) of the dividend behind the 14 and repeat the process: 148 / 81

Moving on to step 3:
81 can be fit into 148 1 times, resulting in a remainder of 67.
The next digit of our result is 1. 
Result so far: 11.0
Subtract 81 from 148 to get 67.
Grab the next digit (3) from the dividend, add it to 67, then carry on: 673 / 81

On to step 4:
81 can be fit into 673 8 times, resulting in a remainder of 25.
The next digit of our result is 8. 
Result so far: 118.0
Subtracting 648 from 673 leaves us with 25.
Grab the next digit (9) from the dividend, add it to 25, then carry on: 259 / 81

Going ahead to step 5:
The number 81 fits into 259 3 times, leaving a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 1183.0
Deduct 243 from 259 and we're left with 16.
Append the next digit (9) from the dividend to 16 and continue with: 169 / 81

Let's proceed to step 6:
81 goes into 169 2 times with a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 11832.0
Subtract 162 from 169 to 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.

Let's proceed to step 7:
When dividing 70 by 81, we get 0 with a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 11832.0
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:
The number 81 fits into 700 8 times, leaving a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 11832.08
Subtracting 648 from 700 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 9:
The number 81 fits into 520 6 times, leaving a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 11832.086
If we subtract 486 from 520, we get 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:
If we divide 340 by 81, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 11832.0864
If we take 324 away from 340, we end up 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 11:
81 goes into 160 1 times with a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 11832.08641
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.

Let's proceed to step 12:
If we divide 790 by 81, we get 9 and a remainder of 61.
The next digit of our result is 9. 
Result so far: 11832.086419
The remainder is 61 after subtracting 729 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 13:
81 can be fit into 610 7 times, resulting in a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 11832.0864197
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.

On to step 14:
81 can be fit into 430 5 times, resulting in a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 11832.08641975
Deduct 405 from 430 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

The final result is 11832.08641975 with a remainder of 2.5e-08.