We look at the division of 378687 by 39 
We want to figure out the number of times 378687 can be divided by 39.

Moving on to step 1:
3 divided by 39 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 39

Moving on to step 2:
When dividing 37 by 39, we get 0 with a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 37 after subtracting 0 from 37.
Include the next digit (8) from the dividend after 37, then repeat: 378 / 39

Moving on to step 3:
When dividing 378 by 39, we get 9 with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 351 away from 378, we end up with 27.
Take the next digit (6) from the dividend and append it to 27, then repeat: 276 / 39

On to step 4:
39 goes into 276 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 97.0
Subtracting 273 from 276 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 39

Advancing to step 5:
If we divide 38 by 39, we get 0 and a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 970.0
The remainder is 38 after subtracting 0 from 38.
Append the next digit (7) from the dividend to 38 and continue with: 387 / 39

Advancing to step 6:
39 goes into 387 9 times with a remainder of 36.
Record the quotient 9 as the next digit in the result. 
Result so far: 9709.0
If we take 351 away from 387, 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.

Let's proceed to step 7:
360 divided by 39 is 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 9709.9
The remainder is 9 after subtracting 351 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
39 goes into 90 2 times with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 9709.92
Subtracting 78 from 90 leaves us 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 9:
The number 39 fits into 120 3 times, leaving a remainder of 3.
The next digit of our result is 3. 
Result so far: 9709.923
Deduct 117 from 120 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 10:
If we divide 30 by 39, we get 0 and a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 9709.923
If we take 0 away from 30, 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.

Going ahead to step 11:
39 goes into 300 7 times with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 9709.92307
The remainder is 27 after subtracting 273 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 12:
270 divided by 39 is 6 with a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 9709.923076
If we subtract 234 from 270, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 13:
If we divide 360 by 39, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 9709.9230769
Subtracting 351 from 360 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 14:
90 divided by 39 is 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 9709.92307692
Subtracting 78 from 90 leaves us 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.

The final outcome is 9709.92307692, with a leftover of 1.2e-08.