We're dividing 630660 by 15 
Let's see how many times 15 fits into 630660.

Step 1:
6 divided by 15 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 15

Step 2:
If we divide 63 by 15, we get 4 and a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 60 away from 63, we end up with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 15

Moving on to step 3:
If we divide 30 by 15, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtract 30 from 30 to get 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 15

Going ahead to step 4:
When dividing 6 by 15, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 420.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 15

Advancing to step 5:
When dividing 66 by 15, we get 4 with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4204.0
The remainder is 6 after subtracting 60 from 66.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 15

Going ahead to step 6:
The number 15 fits into 60 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 42044.0
If we subtract 60 from 60, 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.

Moving on to step 7:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 42044.0
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.

Advancing to step 8:
0 divided by 15 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 42044.0
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.

After the division, we end up with 42044.0 and a remainder of 0.0.