Let's divide 639916 by 91
We want to divide 639916 by 91.

Step 1:
91 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 91

Let's proceed to step 2:
If we divide 63 by 91, we get 0 and a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 91

Going ahead to step 3:
When dividing 639 by 91, we get 7 with a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 637 from 639 leaves us with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 91

Let's proceed to step 4:
29 divided by 91 is 0 with a remainder of 29.
Write down 0 as next digit of the result. 
Result so far: 70.0
The remainder is 29 after subtracting 0 from 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 91

Advancing to step 5:
291 divided by 91 is 3 with a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 703.0
If we subtract 273 from 291, we get 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 91

Going ahead to step 6:
91 can be fit into 186 2 times, resulting in a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 7032.0
The remainder is 4 after subtracting 182 from 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
91 can be fit into 40 0 times, resulting in a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7032.0
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
The number 91 fits into 400 4 times, leaving a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 7032.04
If we subtract 364 from 400, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
If we divide 360 by 91, we get 3 and a remainder of 87.
Record the quotient 3 as the next digit in the result. 
Result so far: 7032.043
If we subtract 273 from 360, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 10:
When dividing 870 by 91, we get 9 with a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 7032.0439
If we take 819 away from 870, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 11:
510 divided by 91 is 5 with a remainder of 55.
The next digit of our result is 5. 
Result so far: 7032.04395
Subtract 455 from 510 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 12:
If we divide 550 by 91, we get 6 and a remainder of 4.
The next digit of our result is 6. 
Result so far: 7032.043956
Subtract 546 from 550 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 13:
91 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 7032.043956
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 14:
When dividing 400 by 91, we get 4 with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 7032.04395604
Deduct 364 from 400 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

In conclusion, the division gives 7032.04395604 with a balance of 3.6e-08.