We look at the division of 51609200 by 409 
We're looking to find how many times 409 goes into 51609200.

Advancing to step 1:
409 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 409

Step 2:
51 divided by 409 is 0 with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Grab the next digit (6) from the dividend, add it to 51, then carry on: 516 / 409

Let's proceed to step 3:
When dividing 516 by 409, we get 1 with a remainder of 107.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 409 from 516 and we're left with 107.
Grab the next digit (0) from the dividend, add it to 107, then carry on: 1070 / 409

Advancing to step 4:
If we divide 1070 by 409, we get 2 and a remainder of 252.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 252 after subtracting 818 from 1070.
Append the next digit (9) from the dividend to 252 and continue with: 2529 / 409

On to step 5:
409 goes into 2529 6 times with a remainder of 75.
The next digit of our result is 6. 
Result so far: 126.0
Subtracting 2454 from 2529 leaves us with 75.
Fetch the next digit (2) from the dividend, attach it to 75 and continue: 752 / 409

Moving on to step 6:
409 can be fit into 752 1 times, resulting in a remainder of 343.
Use 1 as the next digit of our solution. 
Result so far: 1261.0
Deduct 409 from 752 and we're left with 343.
Append the next digit (0) from the dividend to 343 and continue with: 3430 / 409

Step 7:
409 goes into 3430 8 times with a remainder of 158.
The next digit of our result is 8. 
Result so far: 12618.0
Subtracting 3272 from 3430 leaves us with 158.
Take the next digit (0) from the dividend and append it to 158, then repeat: 1580 / 409

On to step 8:
If we divide 1580 by 409, we get 3 and a remainder of 353.
Write down 3 as next digit of the result. 
Result so far: 126183.0
Subtracting 1227 from 1580 leaves us with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

On to step 9:
When dividing 3530 by 409, we get 8 with a remainder of 258.
The next digit of our result is 8. 
Result so far: 126183.8
Subtracting 3272 from 3530 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 10:
When dividing 2580 by 409, we get 6 with a remainder of 126.
Record the quotient 6 as the next digit in the result. 
Result so far: 126183.86
If we take 2454 away from 2580, we end up with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 11:
1260 divided by 409 is 3 with a remainder of 33.
Use 3 as the next digit of our solution. 
Result so far: 126183.863
If we subtract 1227 from 1260, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 12:
When dividing 330 by 409, we get 0 with a remainder of 330.
Put 0 as the next digit of the answer. 
Result so far: 126183.863
If we take 0 away from 330, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Going ahead to step 13:
409 goes into 3300 8 times with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 126183.86308
The remainder is 28 after subtracting 3272 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 14:
409 can be fit into 280 0 times, resulting in a remainder of 280.
Write down 0 as next digit of the result. 
Result so far: 126183.86308
The remainder is 280 after subtracting 0 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 15:
409 can be fit into 2800 6 times, resulting in a remainder of 346.
Use 6 as the next digit of our solution. 
Result so far: 126183.8630806
Subtracting 2454 from 2800 leaves us with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

On to step 16:
3460 divided by 409 is 8 with a remainder of 188.
Use 8 as the next digit of our solution. 
Result so far: 126183.86308068
Deduct 3272 from 3460 and we're left with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final outcome is 126183.86308068, with a leftover of 1.88e-07.