We're dividing 78538855 by 39 
We want to divide 78538855 by 39.

Step 1:
If we divide 7 by 39, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 39

Going ahead to step 2:
39 can be fit into 78 2 times, resulting in a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 78 from 78 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 39

Moving on to step 3:
The number 39 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we take 0 away from 5, we end up with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 39

Moving on to step 4:
The number 39 fits into 53 1 times, leaving a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 201.0
Subtract 39 from 53 to get 14.
Append the next digit (8) from the dividend to 14 and continue with: 148 / 39

Going ahead to step 5:
If we divide 148 by 39, we get 3 and a remainder of 31.
The number 3 becomes the next digit in our result. 
Result so far: 2013.0
Deduct 117 from 148 and we're left with 31.
Take the next digit (8) from the dividend and append it to 31, then repeat: 318 / 39

Advancing to step 6:
If we divide 318 by 39, we get 8 and a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 20138.0
If we subtract 312 from 318, we get 6.
Bring next digit (5) of the dividend behind the 6 and repeat the process: 65 / 39

Moving on to step 7:
When dividing 65 by 39, we get 1 with a remainder of 26.
Write down 1 as next digit of the result. 
Result so far: 201381.0
If we subtract 39 from 65, we get 26.
Bring next digit (5) of the dividend behind the 26 and repeat the process: 265 / 39

On to step 8:
When dividing 265 by 39, we get 6 with a remainder of 31.
The next digit of our result is 6. 
Result so far: 2013816.0
If we subtract 234 from 265, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 9:
39 goes into 310 7 times with a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 2013816.7
The remainder is 37 after subtracting 273 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 10:
If we divide 370 by 39, we get 9 and a remainder of 19.
The next digit of our result is 9. 
Result so far: 2013816.79
Subtract 351 from 370 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 11:
The number 39 fits into 190 4 times, leaving a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 2013816.794
If we take 156 away from 190, we end up 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.

Going ahead to step 12:
The number 39 fits into 340 8 times, leaving a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 2013816.7948
The remainder is 28 after subtracting 312 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 13:
If we divide 280 by 39, we get 7 and a remainder of 7.
The next digit of our result is 7. 
Result so far: 2013816.79487
Subtract 273 from 280 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 14:
If we divide 70 by 39, we get 1 and a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 2013816.794871
Deduct 39 from 70 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 15:
39 goes into 310 7 times with a remainder of 37.
Record the quotient 7 as the next digit in the result. 
Result so far: 2013816.7948717
The remainder is 37 after subtracting 273 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 16:
39 goes into 370 9 times with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 2013816.79487179
Subtracting 351 from 370 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

After the division, we end up with 2013816.79487179 and a remainder of 1.9e-08.