We're dividing 643699 by 79 
We're looking to find how many times 79 goes into 643699.

Advancing to step 1:
The number 79 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 79

Going ahead to step 2:
If we divide 64 by 79, we get 0 and a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (3) from the dividend, attach it to 64 and continue: 643 / 79

Advancing to step 3:
643 divided by 79 is 8 with a remainder of 11.
The next digit of our result is 8. 
Result so far: 8.0
If we take 632 away from 643, we end up with 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 79

On to step 4:
116 divided by 79 is 1 with a remainder of 37.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
Subtract 79 from 116 to get 37.
Grab the next digit (9) from the dividend, add it to 37, then carry on: 379 / 79

Let's proceed to step 5:
The number 79 fits into 379 4 times, leaving a remainder of 63.
The number 4 becomes the next digit in our result. 
Result so far: 814.0
Subtracting 316 from 379 leaves us with 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 79

Going ahead to step 6:
79 goes into 639 8 times with a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 8148.0
If we take 632 away from 639, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
79 can be fit into 70 0 times, resulting in a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 8148.0
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 8:
79 can be fit into 700 8 times, resulting in a remainder of 68.
Record the quotient 8 as the next digit in the result. 
Result so far: 8148.08
Deduct 632 from 700 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.

Advancing to step 9:
When dividing 680 by 79, we get 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 8148.088
Subtracting 632 from 680 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 8148.088 with a remainder of 0.0048.