353263 ÷ 20 
We want to figure out the number of times 353263 can be divided by 20.

Going ahead to step 1:
When dividing 3 by 20, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 20

Advancing to step 2:
20 can be fit into 35 1 times, resulting in a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 15 after subtracting 20 from 35.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 20

Moving on to step 3:
20 can be fit into 153 7 times, resulting in a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Deduct 140 from 153 and we're left with 13.
Fetch the next digit (2) from the dividend, attach it to 13 and continue: 132 / 20

Step 4:
The number 20 fits into 132 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 176.0
If we take 120 away from 132, we end up with 12.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 20

Going ahead to step 5:
The number 20 fits into 126 6 times, leaving a remainder of 6.
The number 6 becomes the next digit in our result. 
Result so far: 1766.0
If we subtract 120 from 126, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 20

Moving on to step 6:
63 divided by 20 is 3 with a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 17663.0
The remainder is 3 after subtracting 60 from 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
When dividing 30 by 20, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 17663.1
Subtracting 20 from 30 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:
100 divided by 20 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 17663.15
If we take 100 away from 100, 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:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 17663.15
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.

Going ahead to step 10:
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: 17663.15
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 result is 17663.15 with a remainder of 0.0.