Let's divide 420599 by 25
We're looking to find how many times 25 goes into 420599.

On to step 1:
25 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 25

Advancing to step 2:
The number 25 fits into 42 1 times, leaving a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 25 from 42, we get 17.
Bring next digit (0) of the dividend behind the 17 and repeat the process: 170 / 25

Moving on to step 3:
If we divide 170 by 25, we get 6 and a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 150 from 170 leaves us with 20.
Append the next digit (5) from the dividend to 20 and continue with: 205 / 25

Advancing to step 4:
If we divide 205 by 25, we get 8 and a remainder of 5.
The next digit of our result is 8. 
Result so far: 168.0
If we take 200 away from 205, we end up with 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 25

On to step 5:
When dividing 59 by 25, we get 2 with a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 1682.0
The remainder is 9 after subtracting 50 from 59.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 25

Step 6:
25 can be fit into 99 3 times, resulting in a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 16823.0
Subtract 75 from 99 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 7:
240 divided by 25 is 9 with a remainder of 15.
The next digit of our result is 9. 
Result so far: 16823.9
Subtracting 225 from 240 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
25 goes into 150 6 times with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 16823.96
The remainder is 0 after subtracting 150 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
If we divide 0 by 25, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16823.96
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.

On to step 10:
0 divided by 25 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16823.96
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.

The final outcome is 16823.96, with a leftover of 0.0.