We're dividing 643391 by 79 
Let's see how many times 79 fits into 643391.

Going ahead to step 1:
When dividing 6 by 79, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 79

Step 2:
79 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Bring next digit (3) of the dividend behind the 64 and repeat the process: 643 / 79

Going ahead to step 3:
If we divide 643 by 79, we get 8 and a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 632 from 643 to get 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 79

Advancing to step 4:
79 can be fit into 113 1 times, resulting in a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 81.0
If we subtract 79 from 113, we get 34.
Include the next digit (9) from the dividend after 34, then repeat: 349 / 79

Advancing to step 5:
349 divided by 79 is 4 with a remainder of 33.
Record the quotient 4 as the next digit in the result. 
Result so far: 814.0
Subtract 316 from 349 to get 33.
Fetch the next digit (1) from the dividend, attach it to 33 and continue: 331 / 79

Advancing to step 6:
The number 79 fits into 331 4 times, leaving a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 8144.0
Subtracting 316 from 331 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
79 can be fit into 150 1 times, resulting in a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 8144.1
If we take 79 away from 150, we end up 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.

Step 8:
The number 79 fits into 710 8 times, leaving a remainder of 78.
The next digit of our result is 8. 
Result so far: 8144.18
Deduct 632 from 710 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 9:
When dividing 780 by 79, we get 9 with a remainder of 69.
Put 9 as the next digit of the answer. 
Result so far: 8144.189
If we take 711 away from 780, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Going ahead to step 10:
690 divided by 79 is 8 with a remainder of 58.
The number 8 becomes the next digit in our result. 
Result so far: 8144.1898
If we take 632 away from 690, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 11:
79 goes into 580 7 times with a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 8144.18987
The remainder is 27 after subtracting 553 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 12:
79 can be fit into 270 3 times, resulting in a remainder of 33.
The next digit of our result is 3. 
Result so far: 8144.189873
Subtracting 237 from 270 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 13:
The number 79 fits into 330 4 times, leaving a remainder of 14.
The next digit of our result is 4. 
Result so far: 8144.1898734
If we take 316 away from 330, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 14:
79 goes into 140 1 times with a remainder of 61.
Record the quotient 1 as the next digit in the result. 
Result so far: 8144.18987341
If we take 79 away from 140, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

After the division, we end up with 8144.18987341 and a remainder of 6.1e-08.