Let's divide 355359 by 20
We're looking to find how many times 20 goes into 355359.

On to step 1:
When dividing 3 by 20, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 20

Let's proceed to step 2:
20 can be fit into 35 1 times, resulting in a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 15 after subtracting 20 from 35.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 20

Step 3:
The number 20 fits into 155 7 times, leaving a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 140 from 155, we get 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 20

Moving on to step 4:
20 goes into 153 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 177.0
Deduct 140 from 153 and we're left with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 20

On to step 5:
20 goes into 135 6 times with a remainder of 15.
The next digit of our result is 6. 
Result so far: 1776.0
The remainder is 15 after subtracting 120 from 135.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 20

Step 6:
20 can be fit into 159 7 times, resulting in a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 17767.0
If we subtract 140 from 159, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
20 can be fit into 190 9 times, resulting in a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 17767.9
Subtracting 180 from 190 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.

Step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 17767.95
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.

Advancing to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17767.95
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 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 17767.95
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 17767.95 and a remainder of 0.0.