398501 ÷ 91 
Let's see how many times 91 fits into 398501.

Let's proceed to step 1:
3 divided by 91 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 91

Advancing to step 2:
When dividing 39 by 91, we get 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Include the next digit (8) from the dividend after 39, then repeat: 398 / 91

On to step 3:
When dividing 398 by 91, we get 4 with a remainder of 34.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 364 from 398 to get 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 91

Let's proceed to step 4:
91 can be fit into 345 3 times, resulting in a remainder of 72.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtract 273 from 345 to get 72.
Include the next digit (0) from the dividend after 72, then repeat: 720 / 91

Moving on to step 5:
91 can be fit into 720 7 times, resulting in a remainder of 83.
The next digit of our result is 7. 
Result so far: 437.0
The remainder is 83 after subtracting 637 from 720.
Grab the next digit (1) from the dividend, add it to 83, then carry on: 831 / 91

On to step 6:
91 goes into 831 9 times with a remainder of 12.
The next digit of our result is 9. 
Result so far: 4379.0
Deduct 819 from 831 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
91 goes into 120 1 times with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 4379.1
Subtracting 91 from 120 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 8:
91 can be fit into 290 3 times, resulting in a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 4379.13
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
170 divided by 91 is 1 with a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 4379.131
The remainder is 79 after subtracting 91 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 10:
If we divide 790 by 91, we get 8 and a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 4379.1318
Subtracting 728 from 790 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 11:
91 goes into 620 6 times with a remainder of 74.
The number 6 becomes the next digit in our result. 
Result so far: 4379.13186
Deduct 546 from 620 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 12:
When dividing 740 by 91, we get 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 4379.131868
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
When dividing 120 by 91, we get 1 with a remainder of 29.
The next digit of our result is 1. 
Result so far: 4379.1318681
Deduct 91 from 120 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 14:
91 can be fit into 290 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 4379.13186813
Deduct 273 from 290 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final result is 4379.13186813 with a remainder of 1.7e-08.