15089804 divided by 123 
We want to figure out the number of times 15089804 can be divided by 123.

Moving on to step 1:
The number 123 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 123

Advancing to step 2:
When dividing 15 by 123, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (0) from the dividend to 15 and continue with: 150 / 123

Going ahead to step 3:
123 can be fit into 150 1 times, resulting in a remainder of 27.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 123 from 150 and we're left with 27.
Append the next digit (8) from the dividend to 27 and continue with: 278 / 123

Going ahead to step 4:
123 goes into 278 2 times with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 246 from 278 to get 32.
Take the next digit (9) from the dividend and append it to 32, then repeat: 329 / 123

Step 5:
123 can be fit into 329 2 times, resulting in a remainder of 83.
Put 2 as the next digit of the answer. 
Result so far: 122.0
If we subtract 246 from 329, we get 83.
Take the next digit (8) from the dividend and append it to 83, then repeat: 838 / 123

Going ahead to step 6:
123 goes into 838 6 times with a remainder of 100.
The next digit of our result is 6. 
Result so far: 1226.0
If we take 738 away from 838, we end up with 100.
Append the next digit (0) from the dividend to 100 and continue with: 1000 / 123

On to step 7:
123 goes into 1000 8 times with a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 12268.0
If we subtract 984 from 1000, we get 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 123

Let's proceed to step 8:
The number 123 fits into 164 1 times, leaving a remainder of 41.
Put 1 as the next digit of the answer. 
Result so far: 122681.0
The remainder is 41 after subtracting 123 from 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 9:
123 goes into 410 3 times with a remainder of 41.
The next digit of our result is 3. 
Result so far: 122681.3
Subtracting 369 from 410 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 10:
123 goes into 410 3 times with a remainder of 41.
Record the quotient 3 as the next digit in the result. 
Result so far: 122681.33
Subtract 369 from 410 to get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

The final outcome is 122681.33, with a leftover of 0.041.