Let's divide 420781 by 15
We're looking to find how many times 15 goes into 420781.

Going ahead 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

Going ahead to step 2:
When dividing 42 by 15, we get 2 with a remainder of 12.
The next digit of our result is 2. 
Result so far: 2.0
If we take 30 away from 42, we end up with 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 15

Moving on to step 3:
The number 15 fits into 120 8 times, leaving a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 28.0
If we take 120 away from 120, we end up with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 15

Moving on to step 4:
15 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 280.0
If we take 0 away from 7, we end up with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 15

Step 5:
If we divide 78 by 15, we get 5 and a remainder of 3.
Record the quotient 5 as the next digit in the result. 
Result so far: 2805.0
Deduct 75 from 78 and we're left with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 15

Let's proceed to step 6:
The number 15 fits into 31 2 times, leaving a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 28052.0
The remainder is 1 after subtracting 30 from 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 7:
10 divided by 15 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 28052.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
100 divided by 15 is 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 28052.06
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
If we divide 100 by 15, we get 6 and a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 28052.066
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 28052.066, with a leftover of 0.001.