641661 divided by 20 
We want to divide 641661 by 20.

Advancing to step 1:
6 divided by 20 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 20

Going ahead to step 2:
The number 20 fits into 64 3 times, leaving a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 60 from 64 leaves us with 4.
Take the next digit (1) from the dividend and append it to 4, then repeat: 41 / 20

Let's proceed to step 3:
20 goes into 41 2 times with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Deduct 40 from 41 and we're left with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 20

Advancing to step 4:
20 goes into 16 0 times with a remainder of 16.
Write down 0 as next digit of the result. 
Result so far: 320.0
If we take 0 away from 16, we end up with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 20

Advancing to step 5:
20 can be fit into 166 8 times, resulting in a remainder of 6.
The next digit of our result is 8. 
Result so far: 3208.0
Subtract 160 from 166 to get 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 20

Going ahead to step 6:
The number 20 fits into 61 3 times, leaving a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 32083.0
Subtract 60 from 61 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 20 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 32083.0
Subtracting 0 from 10 leaves us 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:
100 divided by 20 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 32083.05
If we subtract 100 from 100, 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.

Let's proceed to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 32083.05
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.

On to step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 32083.05
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.

The final result is 32083.05 with a remainder of 0.0.