We look at the division of 866338 by 15 
Our goal is to divide 866338 by 15.

On to step 1:
If we divide 8 by 15, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 15

Advancing to step 2:
15 can be fit into 86 5 times, resulting in a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 11 after subtracting 75 from 86.
Bring next digit (6) of the dividend behind the 11 and repeat the process: 116 / 15

Advancing to step 3:
15 can be fit into 116 7 times, resulting in a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
Deduct 105 from 116 and we're left with 11.
Fetch the next digit (3) from the dividend, attach it to 11 and continue: 113 / 15

Moving on to step 4:
If we divide 113 by 15, we get 7 and a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 577.0
The remainder is 8 after subtracting 105 from 113.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 15

Step 5:
When dividing 83 by 15, we get 5 with a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 5775.0
Deduct 75 from 83 and we're left with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 15

Advancing to step 6:
15 can be fit into 88 5 times, resulting in a remainder of 13.
The next digit of our result is 5. 
Result so far: 57755.0
Subtract 75 from 88 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 7:
When dividing 130 by 15, we get 8 with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 57755.8
If we subtract 120 from 130, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 57755.86
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
100 divided by 15 is 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 57755.866
Subtracting 90 from 100 leaves us 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.

The quotient of the division is 57755.866, and the remainder is 0.001.