We're dividing 643888 by 82 
We're looking to find how many times 82 goes into 643888.

Let's proceed to step 1:
82 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 82

Moving on to step 2:
64 divided by 82 is 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 82

Moving on to step 3:
If we divide 643 by 82, we get 7 and a remainder of 69.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 574 from 643 leaves us with 69.
Take the next digit (8) from the dividend and append it to 69, then repeat: 698 / 82

Step 4:
82 goes into 698 8 times with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we subtract 656 from 698, we get 42.
Append the next digit (8) from the dividend to 42 and continue with: 428 / 82

Step 5:
428 divided by 82 is 5 with a remainder of 18.
Write down 5 as next digit of the result. 
Result so far: 785.0
Subtracting 410 from 428 leaves us with 18.
Fetch the next digit (8) from the dividend, attach it to 18 and continue: 188 / 82

Going ahead to step 6:
The number 82 fits into 188 2 times, leaving a remainder of 24.
The next digit of our result is 2. 
Result so far: 7852.0
Subtract 164 from 188 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
If we divide 240 by 82, we get 2 and a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 7852.2
Subtracting 164 from 240 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
760 divided by 82 is 9 with a remainder of 22.
The next digit of our result is 9. 
Result so far: 7852.29
Deduct 738 from 760 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 9:
220 divided by 82 is 2 with a remainder of 56.
The next digit of our result is 2. 
Result so far: 7852.292
The remainder is 56 after subtracting 164 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 10:
When dividing 560 by 82, we get 6 with a remainder of 68.
The number 6 becomes the next digit in our result. 
Result so far: 7852.2926
Deduct 492 from 560 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 11:
The number 82 fits into 680 8 times, leaving a remainder of 24.
The next digit of our result is 8. 
Result so far: 7852.29268
If we take 656 away from 680, we end up with 24.
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 12:
82 can be fit into 240 2 times, resulting in a remainder of 76.
The number 2 becomes the next digit in our result. 
Result so far: 7852.292682
Subtracting 164 from 240 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 13:
82 can be fit into 760 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 7852.2926829
If we subtract 738 from 760, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 14:
220 divided by 82 is 2 with a remainder of 56.
Put 2 as the next digit of the answer. 
Result so far: 7852.29268292
Deduct 164 from 220 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The quotient of the division is 7852.29268292, and the remainder is 5.6e-08.