661659 ÷ 15 
Let's see how many times 15 fits into 661659.

Moving on to step 1:
15 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 15

Step 2:
66 divided by 15 is 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 60 from 66, we get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 15

Let's proceed to step 3:
When dividing 61 by 15, we get 4 with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 44.0
The remainder is 1 after subtracting 60 from 61.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 15

Let's proceed to step 4:
16 divided by 15 is 1 with a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 441.0
Subtract 15 from 16 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 15

Step 5:
15 can be fit into 15 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 4411.0
Subtracting 15 from 15 leaves us with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 15

Going ahead to step 6:
If we divide 9 by 15, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 44110.0
If we take 0 away from 9, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
The number 15 fits into 90 6 times, leaving a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 44110.6
Deduct 90 from 90 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 8:
15 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 44110.6
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.

On to step 9:
When dividing 0 by 15, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 44110.6
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 final result is 44110.6 with a remainder of 0.0.