55480174 ÷ 815 
Our goal is to divide 55480174 by 815.

Advancing to step 1:
815 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 815

Step 2:
The number 815 fits into 55 0 times, leaving a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 55, we end up with 55.
Append the next digit (4) from the dividend to 55 and continue with: 554 / 815

Going ahead to step 3:
The number 815 fits into 554 0 times, leaving a remainder of 554.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 554 and we're left with 554.
Fetch the next digit (8) from the dividend, attach it to 554 and continue: 5548 / 815

Let's proceed to step 4:
815 goes into 5548 6 times with a remainder of 658.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 4890 from 5548, we get 658.
Include the next digit (0) from the dividend after 658, then repeat: 6580 / 815

Going ahead to step 5:
When dividing 6580 by 815, we get 8 with a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 68.0
If we take 6520 away from 6580, we end up with 60.
Grab the next digit (1) from the dividend, add it to 60, then carry on: 601 / 815

Advancing to step 6:
When dividing 601 by 815, we get 0 with a remainder of 601.
Use 0 as the next digit of our solution. 
Result so far: 680.0
If we subtract 0 from 601, we get 601.
Grab the next digit (7) from the dividend, add it to 601, then carry on: 6017 / 815

Moving on to step 7:
815 goes into 6017 7 times with a remainder of 312.
Put 7 as the next digit of the answer. 
Result so far: 6807.0
If we take 5705 away from 6017, we end up with 312.
Take the next digit (4) from the dividend and append it to 312, then repeat: 3124 / 815

Moving on to step 8:
815 goes into 3124 3 times with a remainder of 679.
Put 3 as the next digit of the answer. 
Result so far: 68073.0
Deduct 2445 from 3124 and we're left with 679.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6790, and continue the process.

Step 9:
815 goes into 6790 8 times with a remainder of 270.
The number 8 becomes the next digit in our result. 
Result so far: 68073.8
Deduct 6520 from 6790 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 10:
2700 divided by 815 is 3 with a remainder of 255.
Write down 3 as next digit of the result. 
Result so far: 68073.83
Deduct 2445 from 2700 and we're left with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 11:
815 goes into 2550 3 times with a remainder of 105.
Record the quotient 3 as the next digit in the result. 
Result so far: 68073.833
If we subtract 2445 from 2550, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

The final result is 68073.833 with a remainder of 0.0105.