We're dividing 51306449 by 405 
We're looking to find how many times 405 goes into 51306449.

Let's proceed to step 1:
The number 405 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 405

Moving on to step 2:
405 goes into 51 0 times with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Take the next digit (3) from the dividend and append it to 51, then repeat: 513 / 405

Let's proceed to step 3:
If we divide 513 by 405, we get 1 and a remainder of 108.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 405 from 513 and we're left with 108.
Bring next digit (0) of the dividend behind the 108 and repeat the process: 1080 / 405

Step 4:
405 can be fit into 1080 2 times, resulting in a remainder of 270.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 810 away from 1080, we end up with 270.
Fetch the next digit (6) from the dividend, attach it to 270 and continue: 2706 / 405

Step 5:
If we divide 2706 by 405, we get 6 and a remainder of 276.
Put 6 as the next digit of the answer. 
Result so far: 126.0
The remainder is 276 after subtracting 2430 from 2706.
Grab the next digit (4) from the dividend, add it to 276, then carry on: 2764 / 405

Moving on to step 6:
405 can be fit into 2764 6 times, resulting in a remainder of 334.
Record the quotient 6 as the next digit in the result. 
Result so far: 1266.0
Subtracting 2430 from 2764 leaves us with 334.
Append the next digit (4) from the dividend to 334 and continue with: 3344 / 405

Going ahead to step 7:
3344 divided by 405 is 8 with a remainder of 104.
Write down 8 as next digit of the result. 
Result so far: 12668.0
Deduct 3240 from 3344 and we're left with 104.
Grab the next digit (9) from the dividend, add it to 104, then carry on: 1049 / 405

Advancing to step 8:
When dividing 1049 by 405, we get 2 with a remainder of 239.
Use 2 as the next digit of our solution. 
Result so far: 126682.0
Subtracting 810 from 1049 leaves us with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Going ahead to step 9:
The number 405 fits into 2390 5 times, leaving a remainder of 365.
The next digit of our result is 5. 
Result so far: 126682.5
If we take 2025 away from 2390, we end up with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Step 10:
3650 divided by 405 is 9 with a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 126682.59
Deduct 3645 from 3650 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 11:
When dividing 50 by 405, we get 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 126682.59
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 12:
When dividing 500 by 405, we get 1 with a remainder of 95.
Put 1 as the next digit of the answer. 
Result so far: 126682.5901
Deduct 405 from 500 and we're left with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Let's proceed to step 13:
If we divide 950 by 405, we get 2 and a remainder of 140.
The next digit of our result is 2. 
Result so far: 126682.59012
If we take 810 away from 950, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 14:
When dividing 1400 by 405, we get 3 with a remainder of 185.
Use 3 as the next digit of our solution. 
Result so far: 126682.590123
The remainder is 185 after subtracting 1215 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Let's proceed to step 15:
405 goes into 1850 4 times with a remainder of 230.
Record the quotient 4 as the next digit in the result. 
Result so far: 126682.5901234
The remainder is 230 after subtracting 1620 from 1850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 16:
405 can be fit into 2300 5 times, resulting in a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 126682.59012345
If we take 2025 away from 2300, we end up with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

The final outcome is 126682.59012345, with a leftover of 2.75e-07.