Let's divide 81646 by 20
We're looking to find how many times 20 goes into 81646.

On to step 1:
20 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 20

Step 2:
20 goes into 81 4 times with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 80 from 81 to get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 20

Step 3:
20 goes into 16 0 times with a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 40.0
Subtract 0 from 16 to get 16.
Bring next digit (4) of the dividend behind the 16 and repeat the process: 164 / 20

Moving on to step 4:
20 can be fit into 164 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 408.0
Subtract 160 from 164 to get 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 20

On to step 5:
The number 20 fits into 46 2 times, leaving a remainder of 6.
The next digit of our result is 2. 
Result so far: 4082.0
If we subtract 40 from 46, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 6:
60 divided by 20 is 3 with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 4082.3
Deduct 60 from 60 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.

Advancing to step 7:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4082.3
The remainder is 0 after subtracting 0 from 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 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 4082.3
If we take 0 away from 0, we end up 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 quotient of the division is 4082.3, and the remainder is 0.0.