640436 ÷ 83 
We want to figure out the number of times 640436 can be divided by 83.

Going ahead to step 1:
83 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 83

Moving on to step 2:
If we divide 64 by 83, we get 0 and a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 83

Going ahead to step 3:
If we divide 640 by 83, we get 7 and a remainder of 59.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 581 from 640 leaves us with 59.
Grab the next digit (4) from the dividend, add it to 59, then carry on: 594 / 83

On to step 4:
594 divided by 83 is 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Subtract 581 from 594 to get 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 83

Let's proceed to step 5:
83 can be fit into 133 1 times, resulting in a remainder of 50.
Record the quotient 1 as the next digit in the result. 
Result so far: 771.0
If we take 83 away from 133, we end up with 50.
Bring next digit (6) of the dividend behind the 50 and repeat the process: 506 / 83

Let's proceed to step 6:
506 divided by 83 is 6 with a remainder of 8.
The next digit of our result is 6. 
Result so far: 7716.0
The remainder is 8 after subtracting 498 from 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
The number 83 fits into 80 0 times, leaving a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 7716.0
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 8:
When dividing 800 by 83, we get 9 with a remainder of 53.
The next digit of our result is 9. 
Result so far: 7716.09
Deduct 747 from 800 and we're left 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.

Step 9:
If we divide 530 by 83, we get 6 and a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 7716.096
Deduct 498 from 530 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
83 can be fit into 320 3 times, resulting in a remainder of 71.
Use 3 as the next digit of our solution. 
Result so far: 7716.0963
Subtract 249 from 320 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 11:
The number 83 fits into 710 8 times, leaving a remainder of 46.
Record the quotient 8 as the next digit in the result. 
Result so far: 7716.09638
The remainder is 46 after subtracting 664 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 12:
460 divided by 83 is 5 with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 7716.096385
If we subtract 415 from 460, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Moving on to step 13:
83 can be fit into 450 5 times, resulting in a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 7716.0963855
Subtract 415 from 450 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final result is 7716.0963855 with a remainder of 3.5e-07.