Let's divide 399739 by 91
We want to figure out the number of times 399739 can be divided by 91.

Moving on to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 91

Going ahead to step 2:
91 goes into 39 0 times with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Include the next digit (9) from the dividend after 39, then repeat: 399 / 91

Advancing to step 3:
91 goes into 399 4 times with a remainder of 35.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 364 away from 399, we end up with 35.
Take the next digit (7) from the dividend and append it to 35, then repeat: 357 / 91

Going ahead to step 4:
91 goes into 357 3 times with a remainder of 84.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
If we subtract 273 from 357, we get 84.
Take the next digit (3) from the dividend and append it to 84, then repeat: 843 / 91

Going ahead to step 5:
91 can be fit into 843 9 times, resulting in a remainder of 24.
Record the quotient 9 as the next digit in the result. 
Result so far: 439.0
Deduct 819 from 843 and we're left with 24.
Grab the next digit (9) from the dividend, add it to 24, then carry on: 249 / 91

Going ahead to step 6:
91 can be fit into 249 2 times, resulting in a remainder of 67.
Use 2 as the next digit of our solution. 
Result so far: 4392.0
If we take 182 away from 249, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 7:
When dividing 670 by 91, we get 7 with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 4392.7
Deduct 637 from 670 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 8:
330 divided by 91 is 3 with a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 4392.73
If we take 273 away from 330, we end up with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 9:
570 divided by 91 is 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 4392.736
The remainder is 24 after subtracting 546 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
The number 91 fits into 240 2 times, leaving a remainder of 58.
Put 2 as the next digit of the answer. 
Result so far: 4392.7362
Subtract 182 from 240 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 11:
91 goes into 580 6 times with a remainder of 34.
The number 6 becomes the next digit in our result. 
Result so far: 4392.73626
Subtract 546 from 580 to 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.

Step 12:
When dividing 340 by 91, we get 3 with a remainder of 67.
The next digit of our result is 3. 
Result so far: 4392.736263
If we take 273 away from 340, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 13:
When dividing 670 by 91, we get 7 with a remainder of 33.
The next digit of our result is 7. 
Result so far: 4392.7362637
Subtract 637 from 670 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 14:
330 divided by 91 is 3 with a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 4392.73626373
If we subtract 273 from 330, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The final result is 4392.73626373 with a remainder of 5.7e-08.