We look at the division of 398320 by 91 
We want to figure out the number of times 398320 can be divided by 91.

Let's proceed to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 91

Going ahead to step 2:
When dividing 39 by 91, we get 0 with a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Grab the next digit (8) from the dividend, add it to 39, then carry on: 398 / 91

On to step 3:
If we divide 398 by 91, we get 4 and a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 364 from 398 to get 34.
Grab the next digit (3) from the dividend, add it to 34, then carry on: 343 / 91

Moving on to step 4:
343 divided by 91 is 3 with a remainder of 70.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
The remainder is 70 after subtracting 273 from 343.
Append the next digit (2) from the dividend to 70 and continue with: 702 / 91

Advancing to step 5:
91 can be fit into 702 7 times, resulting in a remainder of 65.
Write down 7 as next digit of the result. 
Result so far: 437.0
If we take 637 away from 702, we end up with 65.
Fetch the next digit (0) from the dividend, attach it to 65 and continue: 650 / 91

Step 6:
91 goes into 650 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 4377.0
The remainder is 13 after subtracting 637 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
91 can be fit into 130 1 times, resulting in a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 4377.1
Subtract 91 from 130 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 8:
91 goes into 390 4 times with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 4377.14
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 9:
91 goes into 260 2 times with a remainder of 78.
Put 2 as the next digit of the answer. 
Result so far: 4377.142
Subtracting 182 from 260 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 10:
When dividing 780 by 91, we get 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 4377.1428
Deduct 728 from 780 and we're left 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.

Going ahead to step 11:
The number 91 fits into 520 5 times, leaving a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 4377.14285
If we take 455 away from 520, we end up with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 12:
The number 91 fits into 650 7 times, leaving a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 4377.142857
Subtracting 637 from 650 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 13:
If we divide 130 by 91, we get 1 and a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 4377.1428571
Subtracting 91 from 130 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 14:
390 divided by 91 is 4 with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 4377.14285714
If we take 364 away from 390, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The quotient of the division is 4377.14285714, and the remainder is 2.6e-08.