645274 divided by 15 
We're looking to find how many times 15 goes into 645274.

Let's proceed to step 1:
If we divide 6 by 15, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 15

On to step 2:
64 divided by 15 is 4 with a remainder of 4.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 60 from 64 leaves us with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 15

Let's proceed to step 3:
When dividing 45 by 15, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 43.0
If we take 45 away from 45, we end up with 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 15

Moving on to step 4:
If we divide 2 by 15, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 430.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 15

Moving on to step 5:
When dividing 27 by 15, we get 1 with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 4301.0
If we subtract 15 from 27, we get 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 15

On to step 6:
If we divide 124 by 15, we get 8 and a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 43018.0
The remainder is 4 after subtracting 120 from 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
If we divide 40 by 15, we get 2 and a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 43018.2
Subtracting 30 from 40 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.

Step 8:
100 divided by 15 is 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 43018.26
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
When dividing 100 by 15, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 43018.266
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.

Our division results in 43018.266 with a remaining 0.001.