We look at the division of 390805 by 39 
We're looking to find how many times 39 goes into 390805.

Step 1:
39 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 39

Moving on to step 2:
If we divide 39 by 39, we get 1 and a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 39 from 39 leaves us with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 39

Step 3:
0 divided by 39 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10.0
Deduct 0 from 0 and we're left with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 39

Going ahead to step 4:
If we divide 8 by 39, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 100.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 39

On to step 5:
The number 39 fits into 80 2 times, leaving a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 1002.0
Subtract 78 from 80 to get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 39

Step 6:
25 divided by 39 is 0 with a remainder of 25.
The next digit of our result is 0. 
Result so far: 10020.0
The remainder is 25 after subtracting 0 from 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 7:
The number 39 fits into 250 6 times, leaving a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 10020.6
The remainder is 16 after subtracting 234 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
If we divide 160 by 39, we get 4 and a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 10020.64
If we take 156 away from 160, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
39 can be fit into 40 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 10020.641
Subtract 39 from 40 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 10:
If we divide 10 by 39, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 10020.641
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
39 goes into 100 2 times with a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 10020.64102
Subtracting 78 from 100 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 12:
When dividing 220 by 39, we get 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 10020.641025
The remainder is 25 after subtracting 195 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 13:
39 goes into 250 6 times with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 10020.6410256
Subtract 234 from 250 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
39 can be fit into 160 4 times, resulting in a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 10020.64102564
The remainder is 4 after subtracting 156 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 10020.64102564 with a remaining 4e-09.