645866 divided by 79 
Let's see how many times 79 fits into 645866.

Step 1:
79 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 79

Step 2:
When dividing 64 by 79, we get 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Include the next digit (5) from the dividend after 64, then repeat: 645 / 79

Moving on to step 3:
79 goes into 645 8 times with a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 632 from 645 to get 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 79

Step 4:
79 can be fit into 138 1 times, resulting in a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 81.0
The remainder is 59 after subtracting 79 from 138.
Append the next digit (6) from the dividend to 59 and continue with: 596 / 79

Going ahead to step 5:
If we divide 596 by 79, we get 7 and a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 817.0
The remainder is 43 after subtracting 553 from 596.
Bring next digit (6) of the dividend behind the 43 and repeat the process: 436 / 79

Going ahead to step 6:
If we divide 436 by 79, we get 5 and a remainder of 41.
Put 5 as the next digit of the answer. 
Result so far: 8175.0
Subtract 395 from 436 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
79 can be fit into 410 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 8175.5
Deduct 395 from 410 and we're left 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.

Advancing to step 8:
The number 79 fits into 150 1 times, leaving a remainder of 71.
Use 1 as the next digit of our solution. 
Result so far: 8175.51
Subtract 79 from 150 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.

Step 9:
When dividing 710 by 79, we get 8 with a remainder of 78.
The number 8 becomes the next digit in our result. 
Result so far: 8175.518
Subtract 632 from 710 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 10:
780 divided by 79 is 9 with a remainder of 69.
The next digit of our result is 9. 
Result so far: 8175.5189
Subtracting 711 from 780 leaves us 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.

Let's proceed to step 11:
79 goes into 690 8 times with a remainder of 58.
Use 8 as the next digit of our solution. 
Result so far: 8175.51898
Subtracting 632 from 690 leaves us 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 12:
580 divided by 79 is 7 with a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 8175.518987
If we take 553 away from 580, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 13:
If we divide 270 by 79, we get 3 and a remainder of 33.
Record the quotient 3 as the next digit in the result. 
Result so far: 8175.5189873
Subtract 237 from 270 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 14:
79 goes into 330 4 times with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 8175.51898734
If we subtract 316 from 330, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 8175.51898734 with a balance of 1.4e-08.