We look at the division of 15230837 by 409 
We want to divide 15230837 by 409.

Advancing to step 1:
1 divided by 409 is 0 with 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.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 409

Moving on to step 2:
The number 409 fits into 15 0 times, leaving a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 409

Moving on to step 3:
When dividing 152 by 409, we get 0 with a remainder of 152.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 152, we end up with 152.
Take the next digit (3) from the dividend and append it to 152, then repeat: 1523 / 409

On to step 4:
The number 409 fits into 1523 3 times, leaving a remainder of 296.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 1227 from 1523 leaves us with 296.
Take the next digit (0) from the dividend and append it to 296, then repeat: 2960 / 409

Step 5:
When dividing 2960 by 409, we get 7 with a remainder of 97.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Subtracting 2863 from 2960 leaves us with 97.
Append the next digit (8) from the dividend to 97 and continue with: 978 / 409

Let's proceed to step 6:
The number 409 fits into 978 2 times, leaving a remainder of 160.
Record the quotient 2 as the next digit in the result. 
Result so far: 372.0
Subtract 818 from 978 to get 160.
Include the next digit (3) from the dividend after 160, then repeat: 1603 / 409

Moving on to step 7:
1603 divided by 409 is 3 with a remainder of 376.
The number 3 becomes the next digit in our result. 
Result so far: 3723.0
If we take 1227 away from 1603, we end up with 376.
Grab the next digit (7) from the dividend, add it to 376, then carry on: 3767 / 409

Advancing to step 8:
The number 409 fits into 3767 9 times, leaving a remainder of 86.
Write down 9 as next digit of the result. 
Result so far: 37239.0
Subtracting 3681 from 3767 leaves us with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 9:
409 goes into 860 2 times with a remainder of 42.
Write down 2 as next digit of the result. 
Result so far: 37239.2
If we take 818 away from 860, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 10:
If we divide 420 by 409, we get 1 and a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 37239.21
If we subtract 409 from 420, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
110 divided by 409 is 0 with a remainder of 110.
Use 0 as the next digit of our solution. 
Result so far: 37239.21
Subtracting 0 from 110 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 12:
When dividing 1100 by 409, we get 2 with a remainder of 282.
Write down 2 as next digit of the result. 
Result so far: 37239.2102
If we take 818 away from 1100, we end up with 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Going ahead to step 13:
409 goes into 2820 6 times with a remainder of 366.
Record the quotient 6 as the next digit in the result. 
Result so far: 37239.21026
The remainder is 366 after subtracting 2454 from 2820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

On to step 14:
409 goes into 3660 8 times with a remainder of 388.
Write down 8 as next digit of the result. 
Result so far: 37239.210268
If we subtract 3272 from 3660, we get 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

On to step 15:
When dividing 3880 by 409, we get 9 with a remainder of 199.
The number 9 becomes the next digit in our result. 
Result so far: 37239.2102689
Deduct 3681 from 3880 and we're left with 199.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Let's proceed to step 16:
When dividing 1990 by 409, we get 4 with a remainder of 354.
Put 4 as the next digit of the answer. 
Result so far: 37239.21026894
Subtract 1636 from 1990 to get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

After the division, we end up with 37239.21026894 and a remainder of 3.54e-07.