639043 divided by 78 
We want to figure out the number of times 639043 can be divided by 78.

Advancing to step 1:
6 divided by 78 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 78

On to step 2:
The number 78 fits into 63 0 times, leaving a remainder of 63.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 63 to get 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 78

Advancing to step 3:
The number 78 fits into 639 8 times, leaving a remainder of 15.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 15 after subtracting 624 from 639.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 78

Step 4:
78 goes into 150 1 times with a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 81.0
Subtracting 78 from 150 leaves us with 72.
Fetch the next digit (4) from the dividend, attach it to 72 and continue: 724 / 78

On to step 5:
78 can be fit into 724 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 819.0
Deduct 702 from 724 and we're left with 22.
Grab the next digit (3) from the dividend, add it to 22, then carry on: 223 / 78

Step 6:
If we divide 223 by 78, we get 2 and a remainder of 67.
Put 2 as the next digit of the answer. 
Result so far: 8192.0
Subtracting 156 from 223 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 7:
If we divide 670 by 78, we get 8 and a remainder of 46.
Use 8 as the next digit of our solution. 
Result so far: 8192.8
Subtracting 624 from 670 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
78 goes into 460 5 times with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 8192.85
If we take 390 away from 460, we end up with 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 9:
When dividing 700 by 78, we get 8 with a remainder of 76.
Record the quotient 8 as the next digit in the result. 
Result so far: 8192.858
Subtract 624 from 700 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 10:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 8192.8589
If we take 702 away from 760, 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.

Going ahead to step 11:
The number 78 fits into 580 7 times, leaving a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 8192.85897
Subtract 546 from 580 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 12:
The number 78 fits into 340 4 times, leaving a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 8192.858974
If we subtract 312 from 340, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 13:
78 can be fit into 280 3 times, resulting in a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 8192.8589743
Subtracting 234 from 280 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 14:
78 goes into 460 5 times with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 8192.85897435
Deduct 390 from 460 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 8192.85897435 with a balance of 7e-08.