We look at the division of 83431628 by 409 
Let's see how many times 409 fits into 83431628.

Going ahead to step 1:
When dividing 8 by 409, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 409

Let's proceed to step 2:
If we divide 83 by 409, we get 0 and a remainder of 83.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Bring next digit (4) of the dividend behind the 83 and repeat the process: 834 / 409

On to step 3:
When dividing 834 by 409, we get 2 with a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 818 from 834 to get 16.
Include the next digit (3) from the dividend after 16, then repeat: 163 / 409

Moving on to step 4:
The number 409 fits into 163 0 times, leaving a remainder of 163.
Write down 0 as next digit of the result. 
Result so far: 20.0
Deduct 0 from 163 and we're left with 163.
Include the next digit (1) from the dividend after 163, then repeat: 1631 / 409

Advancing to step 5:
409 can be fit into 1631 3 times, resulting in a remainder of 404.
Put 3 as the next digit of the answer. 
Result so far: 203.0
If we subtract 1227 from 1631, we get 404.
Include the next digit (6) from the dividend after 404, then repeat: 4046 / 409

Advancing to step 6:
4046 divided by 409 is 9 with a remainder of 365.
Put 9 as the next digit of the answer. 
Result so far: 2039.0
Subtracting 3681 from 4046 leaves us with 365.
Grab the next digit (2) from the dividend, add it to 365, then carry on: 3652 / 409

On to step 7:
3652 divided by 409 is 8 with a remainder of 380.
Use 8 as the next digit of our solution. 
Result so far: 20398.0
If we take 3272 away from 3652, we end up with 380.
Include the next digit (8) from the dividend after 380, then repeat: 3808 / 409

Step 8:
409 can be fit into 3808 9 times, resulting in a remainder of 127.
The number 9 becomes the next digit in our result. 
Result so far: 203989.0
If we take 3681 away from 3808, we end up with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Advancing to step 9:
When dividing 1270 by 409, we get 3 with a remainder of 43.
Write down 3 as next digit of the result. 
Result so far: 203989.3
Subtracting 1227 from 1270 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 10:
When dividing 430 by 409, we get 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 203989.31
The remainder is 21 after subtracting 409 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 11:
210 divided by 409 is 0 with a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 203989.31
Deduct 0 from 210 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 12:
409 goes into 2100 5 times with a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 203989.3105
Subtract 2045 from 2100 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 13:
409 can be fit into 550 1 times, resulting in a remainder of 141.
Record the quotient 1 as the next digit in the result. 
Result so far: 203989.31051
Subtract 409 from 550 to get 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Step 14:
If we divide 1410 by 409, we get 3 and a remainder of 183.
Put 3 as the next digit of the answer. 
Result so far: 203989.310513
Subtract 1227 from 1410 to get 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

Advancing to step 15:
409 can be fit into 1830 4 times, resulting in a remainder of 194.
Write down 4 as next digit of the result. 
Result so far: 203989.3105134
Subtract 1636 from 1830 to get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Going ahead to step 16:
If we divide 1940 by 409, we get 4 and a remainder of 304.
The number 4 becomes the next digit in our result. 
Result so far: 203989.31051344
Deduct 1636 from 1940 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

After the division, we end up with 203989.31051344 and a remainder of 3.04e-07.