We look at the division of 403646 by 39 
We want to figure out the number of times 403646 can be divided by 39.

Going ahead to step 1:
39 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 39

Going ahead to step 2:
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: 1.0
Subtracting 39 from 40 leaves us with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 39

Going ahead to step 3:
39 goes into 13 0 times with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 13, we end up with 13.
Fetch the next digit (6) from the dividend, attach it to 13 and continue: 136 / 39

Going ahead to step 4:
136 divided by 39 is 3 with a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 103.0
If we take 117 away from 136, we end up with 19.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 39

Going ahead to step 5:
When dividing 194 by 39, we get 4 with a remainder of 38.
The number 4 becomes the next digit in our result. 
Result so far: 1034.0
The remainder is 38 after subtracting 156 from 194.
Take the next digit (6) from the dividend and append it to 38, then repeat: 386 / 39

Let's proceed to step 6:
When dividing 386 by 39, we get 9 with a remainder of 35.
The number 9 becomes the next digit in our result. 
Result so far: 10349.0
Subtracting 351 from 386 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 7:
39 goes into 350 8 times with a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 10349.8
If we take 312 away from 350, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 8:
380 divided by 39 is 9 with a remainder of 29.
Record the quotient 9 as the next digit in the result. 
Result so far: 10349.89
Subtract 351 from 380 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 9:
290 divided by 39 is 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 10349.897
Subtracting 273 from 290 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 10:
39 goes into 170 4 times with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 10349.8974
The remainder is 14 after subtracting 156 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 11:
39 goes into 140 3 times with a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 10349.89743
Subtracting 117 from 140 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 12:
39 can be fit into 230 5 times, resulting in a remainder of 35.
Use 5 as the next digit of our solution. 
Result so far: 10349.897435
Subtract 195 from 230 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 13:
When dividing 350 by 39, we get 8 with a remainder of 38.
Record the quotient 8 as the next digit in the result. 
Result so far: 10349.8974358
The remainder is 38 after subtracting 312 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 14:
39 goes into 380 9 times with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 10349.89743589
If we take 351 away from 380, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

The final outcome is 10349.89743589, with a leftover of 2.9e-08.