We're dividing 51450405 by 422 
Our goal is to divide 51450405 by 422.

Let's proceed to step 1:
If we divide 5 by 422, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 422

Advancing to step 2:
If we divide 51 by 422, we get 0 and a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Grab the next digit (4) from the dividend, add it to 51, then carry on: 514 / 422

Step 3:
If we divide 514 by 422, we get 1 and a remainder of 92.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 422 away from 514, we end up with 92.
Append the next digit (5) from the dividend to 92 and continue with: 925 / 422

Moving on to step 4:
The number 422 fits into 925 2 times, leaving a remainder of 81.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 81 after subtracting 844 from 925.
Include the next digit (0) from the dividend after 81, then repeat: 810 / 422

Going ahead to step 5:
422 can be fit into 810 1 times, resulting in a remainder of 388.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
If we subtract 422 from 810, we get 388.
Grab the next digit (4) from the dividend, add it to 388, then carry on: 3884 / 422

Moving on to step 6:
422 can be fit into 3884 9 times, resulting in a remainder of 86.
The next digit of our result is 9. 
Result so far: 1219.0
The remainder is 86 after subtracting 3798 from 3884.
Take the next digit (0) from the dividend and append it to 86, then repeat: 860 / 422

On to step 7:
422 goes into 860 2 times with a remainder of 16.
The next digit of our result is 2. 
Result so far: 12192.0
Deduct 844 from 860 and we're left with 16.
Take the next digit (5) from the dividend and append it to 16, then repeat: 165 / 422

Advancing to step 8:
The number 422 fits into 165 0 times, leaving a remainder of 165.
Put 0 as the next digit of the answer. 
Result so far: 121920.0
If we take 0 away from 165, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Moving on to step 9:
When dividing 1650 by 422, we get 3 with a remainder of 384.
The next digit of our result is 3. 
Result so far: 121920.3
If we subtract 1266 from 1650, we get 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

On to step 10:
The number 422 fits into 3840 9 times, leaving a remainder of 42.
The number 9 becomes the next digit in our result. 
Result so far: 121920.39
The remainder is 42 after subtracting 3798 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 11:
When dividing 420 by 422, we get 0 with a remainder of 420.
Use 0 as the next digit of our solution. 
Result so far: 121920.39
The remainder is 420 after subtracting 0 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Advancing to step 12:
422 can be fit into 4200 9 times, resulting in a remainder of 402.
Put 9 as the next digit of the answer. 
Result so far: 121920.3909
If we subtract 3798 from 4200, we get 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Step 13:
4020 divided by 422 is 9 with a remainder of 222.
The number 9 becomes the next digit in our result. 
Result so far: 121920.39099
Subtracting 3798 from 4020 leaves us with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

The final result is 121920.39099 with a remainder of 0.000222.