We look at the division of 405598 by 51 
We're looking to find how many times 51 goes into 405598.

On to step 1:
When dividing 4 by 51, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 51

Step 2:
If we divide 40 by 51, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Fetch the next digit (5) from the dividend, attach it to 40 and continue: 405 / 51

Step 3:
If we divide 405 by 51, we get 7 and a remainder of 48.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 357 from 405 leaves us with 48.
Append the next digit (5) from the dividend to 48 and continue with: 485 / 51

Going ahead to step 4:
The number 51 fits into 485 9 times, leaving a remainder of 26.
The next digit of our result is 9. 
Result so far: 79.0
Deduct 459 from 485 and we're left with 26.
Fetch the next digit (9) from the dividend, attach it to 26 and continue: 269 / 51

Advancing to step 5:
If we divide 269 by 51, we get 5 and a remainder of 14.
Use 5 as the next digit of our solution. 
Result so far: 795.0
Subtracting 255 from 269 leaves us with 14.
Include the next digit (8) from the dividend after 14, then repeat: 148 / 51

Step 6:
51 goes into 148 2 times with a remainder of 46.
The number 2 becomes the next digit in our result. 
Result so far: 7952.0
If we subtract 102 from 148, we get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 7:
When dividing 460 by 51, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 7952.9
Deduct 459 from 460 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
The number 51 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 7952.9
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
If we divide 100 by 51, we get 1 and a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 7952.901
Deduct 51 from 100 and we're left with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 10:
The number 51 fits into 490 9 times, leaving a remainder of 31.
The next digit of our result is 9. 
Result so far: 7952.9019
Subtract 459 from 490 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 11:
310 divided by 51 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 7952.90196
Subtract 306 from 310 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
When dividing 40 by 51, we get 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7952.90196
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 13:
51 goes into 400 7 times with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 7952.9019607
Subtracting 357 from 400 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.

Let's proceed to step 14:
430 divided by 51 is 8 with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 7952.90196078
Subtract 408 from 430 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 7952.90196078 with a remainder of 2.2e-08.