51689033 divided by 408 
Our goal is to divide 51689033 by 408.

Let's proceed to step 1:
5 divided by 408 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 408

Advancing to step 2:
408 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.
Include the next digit (6) from the dividend after 51, then repeat: 516 / 408

Step 3:
When dividing 516 by 408, we get 1 with a remainder of 108.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 408 from 516, we get 108.
Grab the next digit (8) from the dividend, add it to 108, then carry on: 1088 / 408

Moving on to step 4:
1088 divided by 408 is 2 with a remainder of 272.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 816 from 1088, we get 272.
Include the next digit (9) from the dividend after 272, then repeat: 2729 / 408

Moving on to step 5:
408 goes into 2729 6 times with a remainder of 281.
The number 6 becomes the next digit in our result. 
Result so far: 126.0
Subtracting 2448 from 2729 leaves us with 281.
Append the next digit (0) from the dividend to 281 and continue with: 2810 / 408

Advancing to step 6:
408 can be fit into 2810 6 times, resulting in a remainder of 362.
Put 6 as the next digit of the answer. 
Result so far: 1266.0
Subtract 2448 from 2810 to get 362.
Include the next digit (3) from the dividend after 362, then repeat: 3623 / 408

On to step 7:
When dividing 3623 by 408, we get 8 with a remainder of 359.
Put 8 as the next digit of the answer. 
Result so far: 12668.0
Subtracting 3264 from 3623 leaves us with 359.
Fetch the next digit (3) from the dividend, attach it to 359 and continue: 3593 / 408

On to step 8:
408 goes into 3593 8 times with a remainder of 329.
The next digit of our result is 8. 
Result so far: 126688.0
Deduct 3264 from 3593 and we're left with 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Let's proceed to step 9:
The number 408 fits into 3290 8 times, leaving a remainder of 26.
The number 8 becomes the next digit in our result. 
Result so far: 126688.8
The remainder is 26 after subtracting 3264 from 3290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
The number 408 fits into 260 0 times, leaving a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 126688.8
Deduct 0 from 260 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 11:
If we divide 2600 by 408, we get 6 and a remainder of 152.
The next digit of our result is 6. 
Result so far: 126688.806
If we take 2448 away from 2600, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 12:
1520 divided by 408 is 3 with a remainder of 296.
The next digit of our result is 3. 
Result so far: 126688.8063
The remainder is 296 after subtracting 1224 from 1520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 13:
408 can be fit into 2960 7 times, resulting in a remainder of 104.
Use 7 as the next digit of our solution. 
Result so far: 126688.80637
The remainder is 104 after subtracting 2856 from 2960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 14:
1040 divided by 408 is 2 with a remainder of 224.
Use 2 as the next digit of our solution. 
Result so far: 126688.806372
Deduct 816 from 1040 and we're left with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 15:
If we divide 2240 by 408, we get 5 and a remainder of 200.
Use 5 as the next digit of our solution. 
Result so far: 126688.8063725
The remainder is 200 after subtracting 2040 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Going ahead to step 16:
408 goes into 2000 4 times with a remainder of 368.
Write down 4 as next digit of the result. 
Result so far: 126688.80637254
If we subtract 1632 from 2000, we get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

The final result is 126688.80637254 with a remainder of 3.68e-07.