We look at the division of 999580 by 15 
We're looking to find how many times 15 goes into 999580.

On to step 1:
The number 15 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 15

Advancing to step 2:
The number 15 fits into 99 6 times, leaving a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 90 from 99, we get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 15

Let's proceed to step 3:
99 divided by 15 is 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 66.0
The remainder is 9 after subtracting 90 from 99.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 15

Let's proceed to step 4:
If we divide 95 by 15, we get 6 and a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 666.0
Subtracting 90 from 95 leaves us with 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 15

Advancing to step 5:
15 goes into 58 3 times with a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 6663.0
Subtract 45 from 58 to get 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 15

Let's proceed to step 6:
130 divided by 15 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 66638.0
If we take 120 away from 130, we end up 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.

Let's proceed to step 7:
The number 15 fits into 100 6 times, leaving a remainder of 10.
The next digit of our result is 6. 
Result so far: 66638.6
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.

Going ahead to step 8:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 66638.66
If we subtract 90 from 100, 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.

The quotient of the division is 66638.66, and the remainder is 0.01.