405172 ÷ 25 
Our goal is to divide 405172 by 25.

Let's proceed to step 1:
When dividing 4 by 25, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 25

Going ahead to step 2:
The number 25 fits into 40 1 times, leaving a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 25 from 40 to get 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 25

Going ahead to step 3:
25 goes into 155 6 times with a remainder of 5.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we take 150 away from 155, we end up with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 25

Advancing to step 4:
25 can be fit into 51 2 times, resulting in a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 162.0
The remainder is 1 after subtracting 50 from 51.
Grab the next digit (7) from the dividend, add it to 1, then carry on: 17 / 25

Step 5:
25 goes into 17 0 times with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 1620.0
If we subtract 0 from 17, we get 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 25

Moving on to step 6:
172 divided by 25 is 6 with a remainder of 22.
The next digit of our result is 6. 
Result so far: 16206.0
The remainder is 22 after subtracting 150 from 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
If we divide 220 by 25, we get 8 and a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 16206.8
If we subtract 200 from 220, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 8:
200 divided by 25 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 16206.88
The remainder is 0 after subtracting 200 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 16206.88 and a remainder of 0.0.