We divide 12404509 by 523
Our goal is to divide 12404509 by 523.

Let's proceed to step 1:
When dividing 1 by 523, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 523

Moving on to step 2:
523 goes into 12 0 times with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 523

Moving on to step 3:
If we divide 124 by 523, we get 0 and a remainder of 124.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 124, we end up with 124.
Append the next digit (0) from the dividend to 124 and continue with: 1240 / 523

Moving on to step 4:
If we divide 1240 by 523, we get 2 and a remainder of 194.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 1046 from 1240, we get 194.
Append the next digit (4) from the dividend to 194 and continue with: 1944 / 523

Advancing to step 5:
When dividing 1944 by 523, we get 3 with a remainder of 375.
Write down 3 as next digit of the result. 
Result so far: 23.0
If we subtract 1569 from 1944, we get 375.
Take the next digit (5) from the dividend and append it to 375, then repeat: 3755 / 523

Let's proceed to step 6:
If we divide 3755 by 523, we get 7 and a remainder of 94.
The number 7 becomes the next digit in our result. 
Result so far: 237.0
If we subtract 3661 from 3755, we get 94.
Include the next digit (0) from the dividend after 94, then repeat: 940 / 523

Step 7:
523 goes into 940 1 times with a remainder of 417.
Put 1 as the next digit of the answer. 
Result so far: 2371.0
Deduct 523 from 940 and we're left with 417.
Include the next digit (9) from the dividend after 417, then repeat: 4179 / 523

Moving on to step 8:
523 can be fit into 4179 7 times, resulting in a remainder of 518.
Use 7 as the next digit of our solution. 
Result so far: 23717.0
If we take 3661 away from 4179, we end up with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Step 9:
The number 523 fits into 5180 9 times, leaving a remainder of 473.
The number 9 becomes the next digit in our result. 
Result so far: 23717.9
Subtracting 4707 from 5180 leaves us with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

On to step 10:
523 goes into 4730 9 times with a remainder of 23.
Record the quotient 9 as the next digit in the result. 
Result so far: 23717.99
Subtract 4707 from 4730 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

The final outcome is 23717.99, with a leftover of 0.023.