343979 ÷ 20 
Our goal is to divide 343979 by 20.

On to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 20

Advancing to step 2:
When dividing 34 by 20, we get 1 with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 20 from 34 leaves us with 14.
Append the next digit (3) from the dividend to 14 and continue with: 143 / 20

Moving on to step 3:
20 goes into 143 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 17.0
Deduct 140 from 143 and we're left with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 20

On to step 4:
20 can be fit into 39 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 171.0
If we take 20 away from 39, we end up with 19.
Bring next digit (7) of the dividend behind the 19 and repeat the process: 197 / 20

Advancing to step 5:
20 can be fit into 197 9 times, resulting in a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 1719.0
If we take 180 away from 197, we end up with 17.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 20

Let's proceed to step 6:
179 divided by 20 is 8 with a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 17198.0
Subtracting 160 from 179 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 7:
When dividing 190 by 20, we get 9 with a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 17198.9
If we take 180 away from 190, we end up 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.

Advancing to step 8:
When dividing 100 by 20, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 17198.95
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.

Let's proceed to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17198.95
Deduct 0 from 0 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.

On to step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 17198.95
Deduct 0 from 0 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.

The final result is 17198.95 with a remainder of 0.0.