We're dividing 51466155 by 408 
Our goal is to divide 51466155 by 408.

Step 1:
408 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
The remainder is 5 after subtracting 0 from 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 408

Step 2:
51 divided by 408 is 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Fetch the next digit (4) from the dividend, attach it to 51 and continue: 514 / 408

Step 3:
If we divide 514 by 408, we get 1 and a remainder of 106.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 408 from 514 to get 106.
Append the next digit (6) from the dividend to 106 and continue with: 1066 / 408

On to step 4:
If we divide 1066 by 408, we get 2 and a remainder of 250.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 816 from 1066 and we're left with 250.
Take the next digit (6) from the dividend and append it to 250, then repeat: 2506 / 408

Moving on to step 5:
When dividing 2506 by 408, we get 6 with a remainder of 58.
The next digit of our result is 6. 
Result so far: 126.0
Subtract 2448 from 2506 to get 58.
Include the next digit (1) from the dividend after 58, then repeat: 581 / 408

Advancing to step 6:
408 can be fit into 581 1 times, resulting in a remainder of 173.
Record the quotient 1 as the next digit in the result. 
Result so far: 1261.0
If we take 408 away from 581, we end up with 173.
Bring next digit (5) of the dividend behind the 173 and repeat the process: 1735 / 408

On to step 7:
If we divide 1735 by 408, we get 4 and a remainder of 103.
Write down 4 as next digit of the result. 
Result so far: 12614.0
Deduct 1632 from 1735 and we're left with 103.
Bring next digit (5) of the dividend behind the 103 and repeat the process: 1035 / 408

Let's proceed to step 8:
408 can be fit into 1035 2 times, resulting in a remainder of 219.
Record the quotient 2 as the next digit in the result. 
Result so far: 126142.0
Subtracting 816 from 1035 leaves us with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Going ahead to step 9:
408 goes into 2190 5 times with a remainder of 150.
Record the quotient 5 as the next digit in the result. 
Result so far: 126142.5
The remainder is 150 after subtracting 2040 from 2190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 10:
408 can be fit into 1500 3 times, resulting in a remainder of 276.
Write down 3 as next digit of the result. 
Result so far: 126142.53
The remainder is 276 after subtracting 1224 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Going ahead to step 11:
If we divide 2760 by 408, we get 6 and a remainder of 312.
Put 6 as the next digit of the answer. 
Result so far: 126142.536
Subtract 2448 from 2760 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Step 12:
The number 408 fits into 3120 7 times, leaving a remainder of 264.
The number 7 becomes the next digit in our result. 
Result so far: 126142.5367
Deduct 2856 from 3120 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

On to step 13:
408 goes into 2640 6 times with a remainder of 192.
Record the quotient 6 as the next digit in the result. 
Result so far: 126142.53676
If we take 2448 away from 2640, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 14:
408 goes into 1920 4 times with a remainder of 288.
The number 4 becomes the next digit in our result. 
Result so far: 126142.536764
Subtract 1632 from 1920 to get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Let's proceed to step 15:
When dividing 2880 by 408, we get 7 with a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 126142.5367647
Subtracting 2856 from 2880 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 16:
If we divide 240 by 408, we get 0 and a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 126142.5367647
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final outcome is 126142.5367647, with a leftover of 2.4e-07.