Let's divide 309051 by 15
Our goal is to divide 309051 by 15.

Step 1:
15 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 15

Let's proceed to step 2:
15 can be fit into 30 2 times, resulting in a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 30 from 30 to get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 15

On to step 3:
15 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Subtract 0 from 9 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 15

Advancing to step 4:
15 goes into 90 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 206.0
Deduct 90 from 90 and we're left with 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 15

Advancing to step 5:
15 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 2060.0
Subtract 0 from 5 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 15

Moving on to step 6:
15 can be fit into 51 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 20603.0
Deduct 45 from 51 and we're left 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.

Advancing to step 7:
If we divide 60 by 15, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 20603.4
If we take 60 away from 60, we end up 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.

On to step 8:
0 divided by 15 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20603.4
Subtracting 0 from 0 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 9:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 20603.4
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.

Our division results in 20603.4 with a remaining 0.0.