We look at the division of 638090 by 91 
We want to divide 638090 by 91.

On to step 1:
When dividing 6 by 91, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 91

Let's proceed to step 2:
63 divided by 91 is 0 with a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 91

On to step 3:
91 goes into 638 7 times with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 637 away from 638, we end up with 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 91

Moving on to step 4:
91 can be fit into 10 0 times, resulting in a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 70.0
Subtracting 0 from 10 leaves us with 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 91

Going ahead to step 5:
When dividing 109 by 91, we get 1 with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 701.0
Subtract 91 from 109 to get 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 91

On to step 6:
The number 91 fits into 180 1 times, leaving a remainder of 89.
The next digit of our result is 1. 
Result so far: 7011.0
The remainder is 89 after subtracting 91 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 7:
91 goes into 890 9 times with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 7011.9
Deduct 819 from 890 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

On to step 8:
When dividing 710 by 91, we get 7 with a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 7011.97
If we take 637 away from 710, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 9:
91 can be fit into 730 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 7011.978
Subtracting 728 from 730 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 91 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 7011.978
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
91 goes into 200 2 times with a remainder of 18.
The next digit of our result is 2. 
Result so far: 7011.97802
Subtracting 182 from 200 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 12:
91 goes into 180 1 times with a remainder of 89.
Write down 1 as next digit of the result. 
Result so far: 7011.978021
Subtract 91 from 180 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 13:
When dividing 890 by 91, we get 9 with a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 7011.9780219
The remainder is 71 after subtracting 819 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 14:
91 can be fit into 710 7 times, resulting in a remainder of 73.
The next digit of our result is 7. 
Result so far: 7011.97802197
Deduct 637 from 710 and we're left with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

The final outcome is 7011.97802197, with a leftover of 7.3e-08.