We look at the division of 393911 by 25 
We want to figure out the number of times 393911 can be divided by 25.

Going ahead to step 1:
If we divide 3 by 25, we get 0 and 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.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 25

Advancing to step 2:
25 can be fit into 39 1 times, resulting in a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 25 from 39, we get 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 25

Step 3:
143 divided by 25 is 5 with a remainder of 18.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we subtract 125 from 143, we get 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 25

Step 4:
25 goes into 189 7 times with a remainder of 14.
The next digit of our result is 7. 
Result so far: 157.0
Deduct 175 from 189 and we're left with 14.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 25

Advancing to step 5:
If we divide 141 by 25, we get 5 and a remainder of 16.
Put 5 as the next digit of the answer. 
Result so far: 1575.0
If we subtract 125 from 141, we get 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 25

Moving on to step 6:
161 divided by 25 is 6 with a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 15756.0
Deduct 150 from 161 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
25 can be fit into 110 4 times, resulting in a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 15756.4
If we subtract 100 from 110, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
When dividing 100 by 25, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 15756.44
Subtracting 100 from 100 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 15756.44 with a remaining 0.0.