54215449 divided by 812 
Our goal is to divide 54215449 by 812.

Let's proceed to step 1:
When dividing 5 by 812, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 812

Going ahead to step 2:
54 divided by 812 is 0 with a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 54 after subtracting 0 from 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 812

Going ahead to step 3:
If we divide 542 by 812, we get 0 and a remainder of 542.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 542 after subtracting 0 from 542.
Fetch the next digit (1) from the dividend, attach it to 542 and continue: 5421 / 812

On to step 4:
5421 divided by 812 is 6 with a remainder of 549.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 549 after subtracting 4872 from 5421.
Include the next digit (5) from the dividend after 549, then repeat: 5495 / 812

On to step 5:
The number 812 fits into 5495 6 times, leaving a remainder of 623.
Put 6 as the next digit of the answer. 
Result so far: 66.0
Deduct 4872 from 5495 and we're left with 623.
Fetch the next digit (4) from the dividend, attach it to 623 and continue: 6234 / 812

Moving on to step 6:
6234 divided by 812 is 7 with a remainder of 550.
Put 7 as the next digit of the answer. 
Result so far: 667.0
Subtracting 5684 from 6234 leaves us with 550.
Bring next digit (4) of the dividend behind the 550 and repeat the process: 5504 / 812

Let's proceed to step 7:
When dividing 5504 by 812, we get 6 with a remainder of 632.
The number 6 becomes the next digit in our result. 
Result so far: 6676.0
Subtract 4872 from 5504 to get 632.
Fetch the next digit (9) from the dividend, attach it to 632 and continue: 6329 / 812

Step 8:
The number 812 fits into 6329 7 times, leaving a remainder of 645.
The number 7 becomes the next digit in our result. 
Result so far: 66767.0
Subtracting 5684 from 6329 leaves us with 645.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6450, and continue the process.

Going ahead to step 9:
6450 divided by 812 is 7 with a remainder of 766.
Put 7 as the next digit of the answer. 
Result so far: 66767.7
Subtracting 5684 from 6450 leaves us with 766.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

Moving on to step 10:
The number 812 fits into 7660 9 times, leaving a remainder of 352.
Write down 9 as next digit of the result. 
Result so far: 66767.79
The remainder is 352 after subtracting 7308 from 7660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Let's proceed to step 11:
The number 812 fits into 3520 4 times, leaving a remainder of 272.
The next digit of our result is 4. 
Result so far: 66767.794
The remainder is 272 after subtracting 3248 from 3520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Step 12:
The number 812 fits into 2720 3 times, leaving a remainder of 284.
Record the quotient 3 as the next digit in the result. 
Result so far: 66767.7943
The remainder is 284 after subtracting 2436 from 2720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Let's proceed to step 13:
812 goes into 2840 3 times with a remainder of 404.
Record the quotient 3 as the next digit in the result. 
Result so far: 66767.79433
If we take 2436 away from 2840, we end up with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

After the division, we end up with 66767.79433 and a remainder of 0.000404.