340395 ÷ 20 
Let's see how many times 20 fits into 340395.

On to step 1:
The number 20 fits into 3 0 times, leaving 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 (4) from the dividend after 3, then repeat: 34 / 20

Moving on to step 2:
20 can be fit into 34 1 times, resulting in a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 20 away from 34, we end up with 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 20

Advancing to step 3:
20 can be fit into 140 7 times, resulting in a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 17.0
The remainder is 0 after subtracting 140 from 140.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 20

Let's proceed to step 4:
20 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 170.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 20

Advancing to step 5:
If we divide 39 by 20, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 1701.0
If we take 20 away from 39, we end up with 19.
Include the next digit (5) from the dividend after 19, then repeat: 195 / 20

Advancing to step 6:
195 divided by 20 is 9 with a remainder of 15.
Record the quotient 9 as the next digit in the result. 
Result so far: 17019.0
Subtract 180 from 195 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 7:
When dividing 150 by 20, we get 7 with a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 17019.7
Subtract 140 from 150 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to 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: 17019.75
Subtracting 100 from 100 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.

Moving on 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: 17019.75
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.

Moving on to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17019.75
If we subtract 0 from 0, 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.

The final outcome is 17019.75, with a leftover of 0.0.