We look at the division of 342657 by 20 
Let's see how many times 20 fits into 342657.

Advancing to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 20

On to step 2:
20 can be fit into 34 1 times, resulting in a remainder of 14.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 14 after subtracting 20 from 34.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 20

Moving on to step 3:
The number 20 fits into 142 7 times, leaving a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 140 from 142, we get 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 20

On to step 4:
If we divide 26 by 20, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 171.0
If we subtract 20 from 26, we get 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 20

On to step 5:
When dividing 65 by 20, we get 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 1713.0
If we subtract 60 from 65, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 20

Going ahead to step 6:
When dividing 57 by 20, we get 2 with a remainder of 17.
The number 2 becomes the next digit in our result. 
Result so far: 17132.0
If we subtract 40 from 57, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
If we divide 170 by 20, we get 8 and a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 17132.8
If we subtract 160 from 170, we 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.

Going ahead 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: 17132.85
Subtract 100 from 100 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.

Moving on to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17132.85
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.

Advancing to step 10:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17132.85
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.

The final outcome is 17132.85, with a leftover of 0.0.