54507415 ÷ 521 
Our goal is to divide 54507415 by 521.

Let's proceed to step 1:
521 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 521

Step 2:
521 goes into 54 0 times with a remainder of 54.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 54, we get 54.
Bring next digit (5) of the dividend behind the 54 and repeat the process: 545 / 521

Going ahead to step 3:
If we divide 545 by 521, we get 1 and a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 521 from 545, we get 24.
Grab the next digit (0) from the dividend, add it to 24, then carry on: 240 / 521

Advancing 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
Subtracting 0 from 240 leaves us with 240.
Fetch the next digit (7) from the dividend, attach it to 240 and continue: 2407 / 521

Going ahead to step 5:
521 can be fit into 2407 4 times, resulting in a remainder of 323.
Use 4 as the next digit of our solution. 
Result so far: 104.0
If we subtract 2084 from 2407, we get 323.
Grab the next digit (4) from the dividend, add it to 323, then carry on: 3234 / 521

On to step 6:
If we divide 3234 by 521, we get 6 and a remainder of 108.
The next digit of our result is 6. 
Result so far: 1046.0
If we take 3126 away from 3234, we end up with 108.
Take the next digit (1) from the dividend and append it to 108, then repeat: 1081 / 521

Advancing to step 7:
521 can be fit into 1081 2 times, resulting in a remainder of 39.
Put 2 as the next digit of the answer. 
Result so far: 10462.0
If we take 1042 away from 1081, we end up with 39.
Fetch the next digit (5) from the dividend, attach it to 39 and continue: 395 / 521

On to step 8:
395 divided by 521 is 0 with a remainder of 395.
The number 0 becomes the next digit in our result. 
Result so far: 104620.0
If we take 0 away from 395, we end up with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 9:
3950 divided by 521 is 7 with a remainder of 303.
Write down 7 as next digit of the result. 
Result so far: 104620.7
Deduct 3647 from 3950 and we're left with 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Step 10:
The number 521 fits into 3030 5 times, leaving a remainder of 425.
Put 5 as the next digit of the answer. 
Result so far: 104620.75
If we subtract 2605 from 3030, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Moving on to step 11:
521 goes into 4250 8 times with a remainder of 82.
Use 8 as the next digit of our solution. 
Result so far: 104620.758
If we take 4168 away from 4250, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 12:
820 divided by 521 is 1 with a remainder of 299.
The next digit of our result is 1. 
Result so far: 104620.7581
If we take 521 away from 820, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Let's proceed to step 13:
When dividing 2990 by 521, we get 5 with a remainder of 385.
Use 5 as the next digit of our solution. 
Result so far: 104620.75815
Subtracting 2605 from 2990 leaves us with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

On to step 14:
When dividing 3850 by 521, we get 7 with a remainder of 203.
The next digit of our result is 7. 
Result so far: 104620.758157
Subtract 3647 from 3850 to get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Moving on to step 15:
When dividing 2030 by 521, we get 3 with a remainder of 467.
Record the quotient 3 as the next digit in the result. 
Result so far: 104620.7581573
If we take 1563 away from 2030, we end up with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Going ahead to step 16:
4670 divided by 521 is 8 with a remainder of 502.
The next digit of our result is 8. 
Result so far: 104620.75815738
Subtracting 4168 from 4670 leaves us with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

The final outcome is 104620.75815738, with a leftover of 5.02e-07.