We're dividing 428497 by 91 
We want to figure out the number of times 428497 can be divided by 91.

Let's proceed to step 1:
If we divide 4 by 91, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 91

Moving on to step 2:
91 can be fit into 42 0 times, resulting in a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Bring next digit (8) of the dividend behind the 42 and repeat the process: 428 / 91

On to step 3:
If we divide 428 by 91, we get 4 and a remainder of 64.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 364 from 428 to get 64.
Take the next digit (4) from the dividend and append it to 64, then repeat: 644 / 91

Moving on to step 4:
If we divide 644 by 91, we get 7 and a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 47.0
The remainder is 7 after subtracting 637 from 644.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 91

Advancing to step 5:
If we divide 79 by 91, we get 0 and a remainder of 79.
Use 0 as the next digit of our solution. 
Result so far: 470.0
The remainder is 79 after subtracting 0 from 79.
Append the next digit (7) from the dividend to 79 and continue with: 797 / 91

Going ahead to step 6:
The number 91 fits into 797 8 times, leaving a remainder of 69.
The number 8 becomes the next digit in our result. 
Result so far: 4708.0
If we subtract 728 from 797, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 7:
91 can be fit into 690 7 times, resulting in a remainder of 53.
The next digit of our result is 7. 
Result so far: 4708.7
If we take 637 away from 690, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 8:
530 divided by 91 is 5 with a remainder of 75.
The next digit of our result is 5. 
Result so far: 4708.75
Subtract 455 from 530 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 9:
The number 91 fits into 750 8 times, leaving a remainder of 22.
The next digit of our result is 8. 
Result so far: 4708.758
The remainder is 22 after subtracting 728 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 10:
If we divide 220 by 91, we get 2 and a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 4708.7582
Subtract 182 from 220 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 11:
The number 91 fits into 380 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 4708.75824
Subtract 364 from 380 to get 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 12:
91 can be fit into 160 1 times, resulting in a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 4708.758241
If we subtract 91 from 160, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 13:
When dividing 690 by 91, we get 7 with a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 4708.7582417
The remainder is 53 after subtracting 637 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 14:
530 divided by 91 is 5 with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 4708.75824175
Subtract 455 from 530 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

The final outcome is 4708.75824175, with a leftover of 7.5e-08.