We look at the division of 402249 by 20 
We're looking to find how many times 20 goes into 402249.

Moving on to step 1:
20 goes into 4 0 times with 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.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 20

Going ahead to step 2:
The number 20 fits into 40 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 40 from 40 leaves us with 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 20

On to step 3:
When dividing 2 by 20, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 20.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 20

Moving on to step 4:
20 goes into 22 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 201.0
If we subtract 20 from 22, we get 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 20

Step 5:
When dividing 24 by 20, we get 1 with a remainder of 4.
The next digit of our result is 1. 
Result so far: 2011.0
If we subtract 20 from 24, we get 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 20

Moving on to step 6:
When dividing 49 by 20, we get 2 with a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 20112.0
Subtract 40 from 49 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
90 divided by 20 is 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 20112.4
Subtracting 80 from 90 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 20112.45
If we subtract 100 from 100, 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.

Let's proceed to step 9:
20 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20112.45
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.

Advancing to step 10:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20112.45
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.

The final outcome is 20112.45, with a leftover of 0.0.