We look at the division of 607639 by 78 
We want to divide 607639 by 78.

On to step 1:
The number 78 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 78

Going ahead to step 2:
78 can be fit into 60 0 times, resulting in a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 60 after subtracting 0 from 60.
Include the next digit (7) from the dividend after 60, then repeat: 607 / 78

Moving on to step 3:
When dividing 607 by 78, we get 7 with a remainder of 61.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 546 from 607 leaves us with 61.
Take the next digit (6) from the dividend and append it to 61, then repeat: 616 / 78

Let's proceed to step 4:
616 divided by 78 is 7 with a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 77.0
Subtracting 546 from 616 leaves us with 70.
Append the next digit (3) from the dividend to 70 and continue with: 703 / 78

Let's proceed to step 5:
78 goes into 703 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 779.0
The remainder is 1 after subtracting 702 from 703.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 78

On to step 6:
78 goes into 19 0 times with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 7790.0
The remainder is 19 after subtracting 0 from 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 7:
190 divided by 78 is 2 with a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 7790.2
Subtracting 156 from 190 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 8:
When dividing 340 by 78, we get 4 with a remainder of 28.
The next digit of our result is 4. 
Result so far: 7790.24
If we take 312 away from 340, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 9:
The number 78 fits into 280 3 times, leaving a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 7790.243
If we take 234 away from 280, we end up 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.

Advancing to step 10:
When dividing 460 by 78, we get 5 with a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 7790.2435
If we subtract 390 from 460, we 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.

Moving on to step 11:
If we divide 700 by 78, we get 8 and a remainder of 76.
The next digit of our result is 8. 
Result so far: 7790.24358
If we subtract 624 from 700, we 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.

Moving on to step 12:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Record the quotient 9 as the next digit in the result. 
Result so far: 7790.243589
Subtract 702 from 760 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 13:
When dividing 580 by 78, we get 7 with a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 7790.2435897
If we subtract 546 from 580, we 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.

Moving on to step 14:
78 can be fit into 340 4 times, resulting in a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 7790.24358974
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.

After the division, we end up with 7790.24358974 and a remainder of 2.8e-08.