Let's divide 603159 by 15
We want to figure out the number of times 603159 can be divided by 15.

Step 1:
The number 15 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 15

Let's proceed to step 2:
15 can be fit into 60 4 times, resulting in a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 60 away from 60, we end up with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 15

On to step 3:
15 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 40.0
If we take 0 away from 3, we end up with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 15

On to step 4:
15 goes into 31 2 times with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 402.0
If we subtract 30 from 31, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 15

Moving on to step 5:
When dividing 15 by 15, we get 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 4021.0
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

Step 6:
15 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 40210.0
The remainder is 9 after subtracting 0 from 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
15 goes into 90 6 times with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 40210.6
Subtract 90 from 90 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.

Going ahead to step 8:
When dividing 0 by 15, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 40210.6
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.

Moving on to step 9:
0 divided by 15 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 40210.6
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.

In conclusion, the division gives 40210.6 with a balance of 0.0.