We're dividing 321138 by 20 
We're looking to find how many times 20 goes into 321138.

Let's proceed to step 1:
20 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 20

On to step 2:
If we divide 32 by 20, we get 1 and a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 20 from 32 and we're left with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 20

Step 3:
If we divide 121 by 20, we get 6 and a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we take 120 away from 121, we end up with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 20

On to step 4:
If we divide 11 by 20, we get 0 and a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 160.0
The remainder is 11 after subtracting 0 from 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 20

Step 5:
113 divided by 20 is 5 with a remainder of 13.
The number 5 becomes the next digit in our result. 
Result so far: 1605.0
If we take 100 away from 113, we end up with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 20

Moving on to step 6:
138 divided by 20 is 6 with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 16056.0
The remainder is 18 after subtracting 120 from 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 7:
When dividing 180 by 20, we get 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 16056.9
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:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 16056.9
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.

On to step 9:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 16056.9
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.

After the division, we end up with 16056.9 and a remainder of 0.0.