We're dividing 20859 by 53 
We're looking to find how many times 53 goes into 20859.

On to step 1:
2 divided by 53 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 53

Advancing to step 2:
If we divide 20 by 53, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Bring next digit (8) of the dividend behind the 20 and repeat the process: 208 / 53

Moving on to step 3:
208 divided by 53 is 3 with a remainder of 49.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 159 from 208, we get 49.
Fetch the next digit (5) from the dividend, attach it to 49 and continue: 495 / 53

Let's proceed to step 4:
53 can be fit into 495 9 times, resulting in a remainder of 18.
The next digit of our result is 9. 
Result so far: 39.0
Deduct 477 from 495 and we're left with 18.
Bring next digit (9) of the dividend behind the 18 and repeat the process: 189 / 53

Moving on to step 5:
If we divide 189 by 53, we get 3 and a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 393.0
Deduct 159 from 189 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 6:
The number 53 fits into 300 5 times, leaving a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 393.5
If we subtract 265 from 300, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 7:
350 divided by 53 is 6 with a remainder of 32.
Put 6 as the next digit of the answer. 
Result so far: 393.56
Deduct 318 from 350 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 8:
53 can be fit into 320 6 times, resulting in a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 393.566
If we take 318 away from 320, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 393.566, with a leftover of 0.0002.