Let's divide 54504012 by 521
Let's see how many times 521 fits into 54504012.

Advancing to step 1:
If we divide 5 by 521, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 521

Going ahead to step 2:
521 can be fit into 54 0 times, resulting in a remainder of 54.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Take the next digit (5) from the dividend and append it to 54, then repeat: 545 / 521

Step 3:
The number 521 fits into 545 1 times, leaving a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 521 from 545 to get 24.
Include the next digit (0) from the dividend after 24, then repeat: 240 / 521

On to step 4:
When dividing 240 by 521, we get 0 with a remainder of 240.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 240, we get 240.
Bring next digit (4) of the dividend behind the 240 and repeat the process: 2404 / 521

Moving on to step 5:
If we divide 2404 by 521, we get 4 and a remainder of 320.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Deduct 2084 from 2404 and we're left with 320.
Bring next digit (0) of the dividend behind the 320 and repeat the process: 3200 / 521

On to step 6:
3200 divided by 521 is 6 with a remainder of 74.
The next digit of our result is 6. 
Result so far: 1046.0
If we subtract 3126 from 3200, we get 74.
Grab the next digit (1) from the dividend, add it to 74, then carry on: 741 / 521

Advancing to step 7:
521 goes into 741 1 times with a remainder of 220.
Write down 1 as next digit of the result. 
Result so far: 10461.0
Subtracting 521 from 741 leaves us with 220.
Fetch the next digit (2) from the dividend, attach it to 220 and continue: 2202 / 521

Going ahead to step 8:
521 can be fit into 2202 4 times, resulting in a remainder of 118.
Write down 4 as next digit of the result. 
Result so far: 104614.0
If we take 2084 away from 2202, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Let's proceed to step 9:
When dividing 1180 by 521, we get 2 with a remainder of 138.
The next digit of our result is 2. 
Result so far: 104614.2
Subtract 1042 from 1180 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 10:
If we divide 1380 by 521, we get 2 and a remainder of 338.
Use 2 as the next digit of our solution. 
Result so far: 104614.22
The remainder is 338 after subtracting 1042 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

The quotient of the division is 104614.22, and the remainder is 0.338.