285274 ÷ 15 
We're looking to find how many times 15 goes into 285274.

Step 1:
When dividing 2 by 15, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 15

Step 2:
15 goes into 28 1 times with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 15 from 28 leaves us with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 15

Moving on to step 3:
15 goes into 135 9 times with a remainder of 0.
The next digit of our result is 9. 
Result so far: 19.0
If we subtract 135 from 135, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 15

Going ahead to step 4:
2 divided by 15 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 190.0
Subtract 0 from 2 to get 2.
Take the next digit (7) from the dividend and append it to 2, then repeat: 27 / 15

Going ahead to step 5:
The number 15 fits into 27 1 times, leaving a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1901.0
If we subtract 15 from 27, we get 12.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 15

Going ahead to step 6:
When dividing 124 by 15, we get 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 19018.0
Subtract 120 from 124 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
When dividing 40 by 15, we get 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 19018.2
If we take 30 away from 40, 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.

Advancing to step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 19018.26
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.

Moving on to step 9:
100 divided by 15 is 6 with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 19018.266
Subtract 90 from 100 to get 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 result is 19018.266 with a remainder of 0.001.