We're dividing 39629666 by 78 
Let's see how many times 78 fits into 39629666.

Going ahead to step 1:
If we divide 3 by 78, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 78

Advancing to step 2:
39 divided by 78 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Grab the next digit (6) from the dividend, add it to 39, then carry on: 396 / 78

On to step 3:
78 goes into 396 5 times with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 390 away from 396, we end up with 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 78

Step 4:
78 goes into 62 0 times with a remainder of 62.
Put 0 as the next digit of the answer. 
Result so far: 50.0
If we subtract 0 from 62, we get 62.
Take the next digit (9) from the dividend and append it to 62, then repeat: 629 / 78

Let's proceed to step 5:
If we divide 629 by 78, we get 8 and a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 508.0
Deduct 624 from 629 and we're left with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 78

Moving on to step 6:
78 can be fit into 56 0 times, resulting in a remainder of 56.
Write down 0 as next digit of the result. 
Result so far: 5080.0
If we subtract 0 from 56, we get 56.
Take the next digit (6) from the dividend and append it to 56, then repeat: 566 / 78

Step 7:
78 can be fit into 566 7 times, resulting in a remainder of 20.
The next digit of our result is 7. 
Result so far: 50807.0
The remainder is 20 after subtracting 546 from 566.
Include the next digit (6) from the dividend after 20, then repeat: 206 / 78

Step 8:
The number 78 fits into 206 2 times, leaving a remainder of 50.
The number 2 becomes the next digit in our result. 
Result so far: 508072.0
Subtract 156 from 206 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
The number 78 fits into 500 6 times, leaving a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 508072.6
If we subtract 468 from 500, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 10:
When dividing 320 by 78, we get 4 with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 508072.64
Subtracting 312 from 320 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 11:
The number 78 fits into 80 1 times, leaving a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 508072.641
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 12:
When dividing 20 by 78, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 508072.641
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 13:
78 can be fit into 200 2 times, resulting in a remainder of 44.
Write down 2 as next digit of the result. 
Result so far: 508072.64102
Deduct 156 from 200 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 14:
When dividing 440 by 78, we get 5 with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 508072.641025
Subtract 390 from 440 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 15:
If we divide 500 by 78, we get 6 and a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 508072.6410256
If we take 468 away from 500, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 16:
If we divide 320 by 78, we get 4 and a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 508072.64102564
Subtract 312 from 320 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

In conclusion, the division gives 508072.64102564 with a balance of 8e-09.