We're dividing 215586 by 1 
We want to divide 215586 by 1.

Step 1:
The number 1 fits into 2 2 times, leaving a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 2 from 2, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 1

Going ahead to step 2:
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: 21.0
If we take 1 away from 1, we end up with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 1

Let's proceed to step 3:
If we divide 5 by 1, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 215.0
If we subtract 5 from 5, we get 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 1

Step 4:
1 goes into 5 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 2155.0
If we subtract 5 from 5, we get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

On to step 5:
1 goes into 8 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 21558.0
The remainder is 0 after subtracting 8 from 8.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Step 6:
The number 1 fits into 6 6 times, leaving a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 215586.0
Deduct 6 from 6 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.

Step 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 215586.0
Deduct 0 from 0 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.

Going ahead to step 8:
0 divided by 1 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 215586.0
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.

The final result is 215586.0 with a remainder of 0.0.