Let's divide 420993 by 15
Let's see how many times 15 fits into 420993.

Advancing to step 1:
When dividing 4 by 15, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 15

Step 2:
15 goes into 42 2 times with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 30 from 42, we get 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 15

Advancing to step 3:
The number 15 fits into 120 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
Subtracting 120 from 120 leaves us with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 15

Going ahead to step 4:
15 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 280.0
Subtract 0 from 9 to get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 15

Moving on to step 5:
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: 2806.0
If we take 90 away from 99, we end up with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 15

On to step 6:
93 divided by 15 is 6 with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 28066.0
Subtracting 90 from 93 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
If we divide 30 by 15, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 28066.2
Deduct 30 from 30 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:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 28066.2
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.

Let's proceed to step 9:
When dividing 0 by 15, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 28066.2
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.

The final outcome is 28066.2, with a leftover of 0.0.