We divide 438598 by 20
We're looking to find how many times 20 goes into 438598.

Moving on to step 1:
When dividing 4 by 20, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 20

Going ahead to step 2:
43 divided by 20 is 2 with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 40 from 43 to get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 20

Step 3:
When dividing 38 by 20, we get 1 with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we take 20 away from 38, we end up with 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 20

Let's proceed to step 4:
When dividing 185 by 20, we get 9 with a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 219.0
Deduct 180 from 185 and we're left with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 20

Moving on to step 5:
If we divide 59 by 20, we get 2 and a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 2192.0
The remainder is 19 after subtracting 40 from 59.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 20

On to step 6:
198 divided by 20 is 9 with a remainder of 18.
Use 9 as the next digit of our solution. 
Result so far: 21929.0
If we subtract 180 from 198, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 7:
When dividing 180 by 20, we get 9 with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 21929.9
Deduct 180 from 180 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.

Advancing to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21929.9
The remainder is 0 after subtracting 0 from 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 9:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21929.9
The remainder is 0 after subtracting 0 from 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 21929.9, with a leftover of 0.0.