660399 divided by 78 
We want to figure out the number of times 660399 can be divided by 78.

Let's proceed to step 1:
78 goes into 6 0 times with 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.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 78

Step 2:
78 can be fit into 66 0 times, resulting in a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Bring next digit (0) of the dividend behind the 66 and repeat the process: 660 / 78

Going ahead to step 3:
78 can be fit into 660 8 times, resulting in a remainder of 36.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 624 from 660 to get 36.
Grab the next digit (3) from the dividend, add it to 36, then carry on: 363 / 78

On to step 4:
78 can be fit into 363 4 times, resulting in a remainder of 51.
Use 4 as the next digit of our solution. 
Result so far: 84.0
If we take 312 away from 363, we end up with 51.
Append the next digit (9) from the dividend to 51 and continue with: 519 / 78

Going ahead to step 5:
When dividing 519 by 78, we get 6 with a remainder of 51.
The number 6 becomes the next digit in our result. 
Result so far: 846.0
If we take 468 away from 519, we end up with 51.
Take the next digit (9) from the dividend and append it to 51, then repeat: 519 / 78

Advancing to step 6:
The number 78 fits into 519 6 times, leaving a remainder of 51.
The next digit of our result is 6. 
Result so far: 8466.0
Deduct 468 from 519 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 7:
78 goes into 510 6 times with a remainder of 42.
Record the quotient 6 as the next digit in the result. 
Result so far: 8466.6
Subtracting 468 from 510 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
420 divided by 78 is 5 with a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 8466.65
Subtracting 390 from 420 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
When dividing 300 by 78, we get 3 with a remainder of 66.
Use 3 as the next digit of our solution. 
Result so far: 8466.653
The remainder is 66 after subtracting 234 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 10:
The number 78 fits into 660 8 times, leaving a remainder of 36.
Put 8 as the next digit of the answer. 
Result so far: 8466.6538
If we take 624 away from 660, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
If we divide 360 by 78, we get 4 and a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 8466.65384
The remainder is 48 after subtracting 312 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 12:
If we divide 480 by 78, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 8466.653846
Deduct 468 from 480 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 13:
The number 78 fits into 120 1 times, leaving a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 8466.6538461
The remainder is 42 after subtracting 78 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 14:
420 divided by 78 is 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 8466.65384615
If we take 390 away from 420, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 8466.65384615 and a remainder of 3e-08.