181239 ÷ 15 
We want to divide 181239 by 15.

Moving on to step 1:
If we divide 1 by 15, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 15

Advancing to step 2:
18 divided by 15 is 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 15 from 18 to get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 15

On to step 3:
When dividing 31 by 15, we get 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 30 from 31 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 15

Advancing to step 4:
If we divide 12 by 15, we get 0 and a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 15

Advancing to step 5:
If we divide 123 by 15, we get 8 and a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 1208.0
Subtracting 120 from 123 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 15

Moving on to step 6:
15 goes into 39 2 times with a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 12082.0
Deduct 30 from 39 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
When dividing 90 by 15, we get 6 with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 12082.6
If we subtract 90 from 90, we 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.

Moving on to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12082.6
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.

Going ahead to step 9:
When dividing 0 by 15, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12082.6
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.

The final result is 12082.6 with a remainder of 0.0.