We look at the division of 423198 by 91 
Our goal is to divide 423198 by 91.

On to step 1:
4 divided by 91 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 91

Moving on to step 2:
42 divided by 91 is 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 91

Step 3:
The number 91 fits into 423 4 times, leaving a remainder of 59.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 364 from 423, we get 59.
Take the next digit (1) from the dividend and append it to 59, then repeat: 591 / 91

Going ahead to step 4:
91 goes into 591 6 times with a remainder of 45.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
Subtracting 546 from 591 leaves us with 45.
Append the next digit (9) from the dividend to 45 and continue with: 459 / 91

Going ahead to step 5:
91 goes into 459 5 times with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 465.0
The remainder is 4 after subtracting 455 from 459.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 91

On to step 6:
When dividing 48 by 91, we get 0 with a remainder of 48.
Put 0 as the next digit of the answer. 
Result so far: 4650.0
Subtract 0 from 48 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 7:
480 divided by 91 is 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 4650.5
If we take 455 away from 480, we end up 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.

Moving on to step 8:
The number 91 fits into 250 2 times, leaving a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 4650.52
Subtract 182 from 250 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 9:
The number 91 fits into 680 7 times, leaving a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 4650.527
If we subtract 637 from 680, 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.

Moving on to step 10:
430 divided by 91 is 4 with a remainder of 66.
Put 4 as the next digit of the answer. 
Result so far: 4650.5274
The remainder is 66 after subtracting 364 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 11:
The number 91 fits into 660 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 4650.52747
Subtract 637 from 660 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 12:
91 can be fit into 230 2 times, resulting in a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 4650.527472
Deduct 182 from 230 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 13:
When dividing 480 by 91, we get 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 4650.5274725
The remainder is 25 after subtracting 455 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 14:
When dividing 250 by 91, we get 2 with a remainder of 68.
The next digit of our result is 2. 
Result so far: 4650.52747252
If we subtract 182 from 250, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The final result is 4650.52747252 with a remainder of 6.8e-08.