We look at the division of 646559 by 30 
Let's see how many times 30 fits into 646559.

Going ahead to step 1:
If we divide 6 by 30, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 30

Going ahead to step 2:
64 divided by 30 is 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 60 from 64, we get 4.
Take the next digit (6) from the dividend and append it to 4, then repeat: 46 / 30

Advancing to step 3:
30 goes into 46 1 times with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 16 after subtracting 30 from 46.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 30

Advancing to step 4:
165 divided by 30 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 215.0
If we take 150 away from 165, we end up with 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 30

Let's proceed to step 5:
The number 30 fits into 155 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 2155.0
If we take 150 away from 155, we end up with 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 30

Step 6:
59 divided by 30 is 1 with a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 21551.0
Deduct 30 from 59 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 7:
30 can be fit into 290 9 times, resulting in a remainder of 20.
Write down 9 as next digit of the result. 
Result so far: 21551.9
If we take 270 away from 290, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
200 divided by 30 is 6 with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 21551.96
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
The number 30 fits into 200 6 times, leaving a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 21551.966
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 21551.966 with a remainder of 0.002.