We divide 669960 by 15
We want to figure out the number of times 669960 can be divided by 15.

Going ahead to step 1:
When dividing 6 by 15, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 15

Moving on to step 2:
The number 15 fits into 66 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 60 away from 66, we end up with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 15

Going ahead to step 3:
The number 15 fits into 69 4 times, leaving a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 44.0
If we take 60 away from 69, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 15

Advancing to step 4:
15 can be fit into 99 6 times, resulting in a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 446.0
Subtract 90 from 99 to get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 15

On to step 5:
15 can be fit into 96 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 4466.0
If we take 90 away from 96, we end up with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 15

Moving on to step 6:
If we divide 60 by 15, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 44664.0
Subtract 60 from 60 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.

Advancing to step 7:
If we divide 0 by 15, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 44664.0
Subtracting 0 from 0 leaves us 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 8:
15 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 44664.0
If we subtract 0 from 0, we 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.

After the division, we end up with 44664.0 and a remainder of 0.0.