We're dividing 491642 by 25 
We want to figure out the number of times 491642 can be divided by 25.

Step 1:
25 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 25

On to step 2:
49 divided by 25 is 1 with a remainder of 24.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 25 from 49 and we're left with 24.
Take the next digit (1) from the dividend and append it to 24, then repeat: 241 / 25

Advancing to step 3:
When dividing 241 by 25, we get 9 with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 19.0
The remainder is 16 after subtracting 225 from 241.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 25

Going ahead to step 4:
If we divide 166 by 25, we get 6 and a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 196.0
Deduct 150 from 166 and we're left with 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 25

Advancing to step 5:
When dividing 164 by 25, we get 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 1966.0
If we take 150 away from 164, we end up with 14.
Append the next digit (2) from the dividend to 14 and continue with: 142 / 25

Going ahead to step 6:
When dividing 142 by 25, we get 5 with a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 19665.0
Subtract 125 from 142 to get 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 7:
170 divided by 25 is 6 with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 19665.6
Subtracting 150 from 170 leaves us 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.

Advancing to step 8:
If we divide 200 by 25, we get 8 and a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 19665.68
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.

Step 9:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 19665.68
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
When dividing 0 by 25, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 19665.68
Subtracting 0 from 0 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.

The final result is 19665.68 with a remainder of 0.0.