Let's divide 168139 by 91
We want to figure out the number of times 168139 can be divided by 91.

Step 1:
If we divide 1 by 91, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 91

Step 2:
If we divide 16 by 91, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 91

On to step 3:
91 can be fit into 168 1 times, resulting in a remainder of 77.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 77 after subtracting 91 from 168.
Bring next digit (1) of the dividend behind the 77 and repeat the process: 771 / 91

Step 4:
If we divide 771 by 91, we get 8 and a remainder of 43.
The next digit of our result is 8. 
Result so far: 18.0
Deduct 728 from 771 and we're left with 43.
Grab the next digit (3) from the dividend, add it to 43, then carry on: 433 / 91

Advancing to step 5:
91 can be fit into 433 4 times, resulting in a remainder of 69.
The next digit of our result is 4. 
Result so far: 184.0
If we take 364 away from 433, we end up with 69.
Bring next digit (9) of the dividend behind the 69 and repeat the process: 699 / 91

Let's proceed to step 6:
When dividing 699 by 91, we get 7 with a remainder of 62.
The number 7 becomes the next digit in our result. 
Result so far: 1847.0
Subtracting 637 from 699 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.

Advancing to step 7:
When dividing 620 by 91, we get 6 with a remainder of 74.
The next digit of our result is 6. 
Result so far: 1847.6
Subtracting 546 from 620 leaves us 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.

On to step 8:
91 goes into 740 8 times with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 1847.68
If we take 728 away from 740, we end up 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.

Going ahead to step 9:
When dividing 120 by 91, we get 1 with a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1847.681
If we take 91 away from 120, we end up 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.

Moving on to step 10:
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: 1847.6813
If we subtract 273 from 290, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 11:
170 divided by 91 is 1 with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 1847.68131
Subtract 91 from 170 to get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 12:
When dividing 790 by 91, we get 8 with a remainder of 62.
The next digit of our result is 8. 
Result so far: 1847.681318
Subtract 728 from 790 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 13:
When dividing 620 by 91, we get 6 with a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 1847.6813186
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.

Moving on to step 14:
When dividing 740 by 91, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 1847.68131868
If we take 728 away from 740, we end up 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.

The final result is 1847.68131868 with a remainder of 1.2e-08.