23581 ÷ 20 
Let's see how many times 20 fits into 23581.

On to step 1:
When dividing 2 by 20, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 20

Step 2:
When dividing 23 by 20, we get 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 20 from 23 and we're left with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 20

Moving on to step 3:
If we divide 35 by 20, we get 1 and a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 20 away from 35, we end up with 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 20

Advancing to step 4:
20 goes into 158 7 times with a remainder of 18.
The next digit of our result is 7. 
Result so far: 117.0
Subtracting 140 from 158 leaves us with 18.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 20

On to step 5:
20 goes into 181 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 1179.0
Deduct 180 from 181 and we're left with 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 6:
If we divide 10 by 20, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 1179.0
Deduct 0 from 10 and we're left 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.

On to step 7:
If we divide 100 by 20, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1179.05
Subtract 100 from 100 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.

Step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1179.05
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.

Going ahead to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1179.05
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.

The quotient of the division is 1179.05, and the remainder is 0.0.