We're dividing 402786 by 15 
We're looking to find how many times 15 goes into 402786.

Going ahead to step 1:
15 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 15

Going ahead to step 2:
15 goes into 40 2 times with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 30 away from 40, we end up with 10.
Append the next digit (2) from the dividend to 10 and continue with: 102 / 15

Step 3:
If we divide 102 by 15, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Deduct 90 from 102 and we're left with 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 15

Moving on to step 4:
If we divide 127 by 15, we get 8 and a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 268.0
Subtracting 120 from 127 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 15

Advancing to step 5:
15 can be fit into 78 5 times, resulting in a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 2685.0
If we subtract 75 from 78, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 15

Going ahead to step 6:
The number 15 fits into 36 2 times, leaving a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 26852.0
If we take 30 away from 36, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 7:
15 can be fit into 60 4 times, resulting in a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 26852.4
Subtracting 60 from 60 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.

Moving on to step 8:
When dividing 0 by 15, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 26852.4
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.

Step 9:
When dividing 0 by 15, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 26852.4
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.

Our division results in 26852.4 with a remaining 0.0.