336642 ÷ 20 
We want to figure out the number of times 336642 can be divided by 20.

Advancing to step 1:
When dividing 3 by 20, we get 0 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.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 20

Moving on to step 2:
The number 20 fits into 33 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 20 from 33, we get 13.
Fetch the next digit (6) from the dividend, attach it to 13 and continue: 136 / 20

Going ahead to step 3:
20 goes into 136 6 times with a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
Subtracting 120 from 136 leaves us with 16.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 20

Going ahead to step 4:
If we divide 166 by 20, we get 8 and a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 168.0
Deduct 160 from 166 and we're left with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 20

Step 5:
20 goes into 64 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 1683.0
If we subtract 60 from 64, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 20

Going ahead to step 6:
20 goes into 42 2 times with a remainder of 2.
The next digit of our result is 2. 
Result so far: 16832.0
Subtract 40 from 42 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
If we divide 20 by 20, we get 1 and a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 16832.1
If we subtract 20 from 20, 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 8:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 16832.1
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.

Let's proceed to step 9:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 16832.1
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.

Our division results in 16832.1 with a remaining 0.0.