81492 divided by 20 
We're looking to find how many times 20 goes into 81492.

Step 1:
8 divided by 20 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 20

Going ahead to step 2:
81 divided by 20 is 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtract 80 from 81 to get 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 20

Going ahead to step 3:
20 goes into 14 0 times with a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
Deduct 0 from 14 and we're left with 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 20

Moving on to step 4:
149 divided by 20 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 407.0
Subtract 140 from 149 to get 9.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 20

Advancing to step 5:
20 goes into 92 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 4074.0
The remainder is 12 after subtracting 80 from 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 6:
20 goes into 120 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 4074.6
If we take 120 away from 120, 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.

On to step 7:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4074.6
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.

Moving on to step 8:
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: 4074.6
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.

After the division, we end up with 4074.6 and a remainder of 0.0.