We look at the division of 669558 by 78 
Our goal is to divide 669558 by 78.

Let's proceed to step 1:
The number 78 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 78

On to step 2:
When dividing 66 by 78, we get 0 with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (9) from the dividend and append it to 66, then repeat: 669 / 78

Moving on to step 3:
If we divide 669 by 78, we get 8 and a remainder of 45.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 624 away from 669, we end up with 45.
Take the next digit (5) from the dividend and append it to 45, then repeat: 455 / 78

Step 4:
The number 78 fits into 455 5 times, leaving a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
Subtracting 390 from 455 leaves us with 65.
Append the next digit (5) from the dividend to 65 and continue with: 655 / 78

Advancing to step 5:
The number 78 fits into 655 8 times, leaving a remainder of 31.
Write down 8 as next digit of the result. 
Result so far: 858.0
The remainder is 31 after subtracting 624 from 655.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 78

Step 6:
When dividing 318 by 78, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 8584.0
If we subtract 312 from 318, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
The number 78 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 8584.0
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
78 can be fit into 600 7 times, resulting in a remainder of 54.
Write down 7 as next digit of the result. 
Result so far: 8584.07
If we subtract 546 from 600, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 9:
78 can be fit into 540 6 times, resulting in a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 8584.076
If we take 468 away from 540, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 10:
The number 78 fits into 720 9 times, leaving a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 8584.0769
Subtracting 702 from 720 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
The number 78 fits into 180 2 times, leaving a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 8584.07692
Subtract 156 from 180 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 12:
78 can be fit into 240 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 8584.076923
Deduct 234 from 240 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 13:
If we divide 60 by 78, we get 0 and a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 8584.076923
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 14:
The number 78 fits into 600 7 times, leaving a remainder of 54.
The next digit of our result is 7. 
Result so far: 8584.07692307
Deduct 546 from 600 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Our division results in 8584.07692307 with a remaining 5.4e-08.