Let's divide 420039 by 25
We want to figure out the number of times 420039 can be divided by 25.

Step 1:
4 divided by 25 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 25

Let's proceed to step 2:
25 goes into 42 1 times with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 17 after subtracting 25 from 42.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 25

Let's proceed to step 3:
25 can be fit into 170 6 times, resulting in a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
The remainder is 20 after subtracting 150 from 170.
Append the next digit (0) from the dividend to 20 and continue with: 200 / 25

Moving on to step 4:
25 goes into 200 8 times with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 168.0
If we take 200 away from 200, we end up with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 25

Going ahead to step 5:
If we divide 3 by 25, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 1680.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 25

Step 6:
25 goes into 39 1 times with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 16801.0
If we subtract 25 from 39, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
If we divide 140 by 25, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 16801.5
Subtracting 125 from 140 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: 16801.56
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.

Advancing to step 9:
0 divided by 25 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16801.56
If we take 0 away from 0, we end up 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.

Step 10:
25 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 16801.56
If we subtract 0 from 0, we 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 16801.56, with a leftover of 0.0.