We look at the division of 81561 by 1 
We want to figure out the number of times 81561 can be divided by 1.

Let's proceed to step 1:
1 can be fit into 8 8 times, resulting in a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtract 8 from 8 to get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Advancing to step 2:
1 goes into 1 1 times with a remainder of 0.
The next digit of our result is 1. 
Result so far: 81.0
Deduct 1 from 1 and we're left with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 1

On to step 3:
1 goes into 5 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 815.0
Subtracting 5 from 5 leaves us with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Step 4:
6 divided by 1 is 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 8156.0
Subtracting 6 from 6 leaves us with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 1

Let's proceed to step 5:
If we divide 1 by 1, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 81561.0
If we take 1 away from 1, 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.

Advancing to step 6:
If we divide 0 by 1, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 81561.0
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.

Let's proceed to step 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 81561.0
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 81561.0, and the remainder is 0.0.