21447 divided by 25 
Our goal is to divide 21447 by 25.

On to step 1:
25 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 25

Let's proceed to step 2:
If we divide 21 by 25, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (4) of the dividend behind the 21 and repeat the process: 214 / 25

Step 3:
214 divided by 25 is 8 with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 200 from 214 to get 14.
Fetch the next digit (4) from the dividend, attach it to 14 and continue: 144 / 25

Moving on to step 4:
144 divided by 25 is 5 with a remainder of 19.
The number 5 becomes the next digit in our result. 
Result so far: 85.0
Subtract 125 from 144 to get 19.
Fetch the next digit (7) from the dividend, attach it to 19 and continue: 197 / 25

Moving on to step 5:
If we divide 197 by 25, we get 7 and a remainder of 22.
The next digit of our result is 7. 
Result so far: 857.0
Subtract 175 from 197 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 6:
If we divide 220 by 25, we get 8 and a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 857.8
Deduct 200 from 220 and we're left with 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 7:
25 goes into 200 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 857.88
Deduct 200 from 200 and we're left 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.

The final outcome is 857.88, with a leftover of 0.0.