55550872 ÷ 521 
We want to divide 55550872 by 521.

Advancing to step 1:
The number 521 fits into 5 0 times, leaving 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.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 521

On to step 2:
The number 521 fits into 55 0 times, leaving a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Bring next digit (5) of the dividend behind the 55 and repeat the process: 555 / 521

On to step 3:
521 can be fit into 555 1 times, resulting in a remainder of 34.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 521 from 555 leaves us with 34.
Fetch the next digit (5) from the dividend, attach it to 34 and continue: 345 / 521

Step 4:
345 divided by 521 is 0 with a remainder of 345.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 345 to get 345.
Grab the next digit (0) from the dividend, add it to 345, then carry on: 3450 / 521

Let's proceed to step 5:
521 can be fit into 3450 6 times, resulting in a remainder of 324.
Write down 6 as next digit of the result. 
Result so far: 106.0
If we subtract 3126 from 3450, we get 324.
Take the next digit (8) from the dividend and append it to 324, then repeat: 3248 / 521

Step 6:
When dividing 3248 by 521, we get 6 with a remainder of 122.
The number 6 becomes the next digit in our result. 
Result so far: 1066.0
The remainder is 122 after subtracting 3126 from 3248.
Grab the next digit (7) from the dividend, add it to 122, then carry on: 1227 / 521

On to step 7:
1227 divided by 521 is 2 with a remainder of 185.
The number 2 becomes the next digit in our result. 
Result so far: 10662.0
If we take 1042 away from 1227, we end up with 185.
Append the next digit (2) from the dividend to 185 and continue with: 1852 / 521

Going ahead to step 8:
521 goes into 1852 3 times with a remainder of 289.
The next digit of our result is 3. 
Result so far: 106623.0
Subtract 1563 from 1852 to get 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Advancing to step 9:
521 goes into 2890 5 times with a remainder of 285.
Put 5 as the next digit of the answer. 
Result so far: 106623.5
If we take 2605 away from 2890, we end up with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Let's proceed to step 10:
The number 521 fits into 2850 5 times, leaving a remainder of 245.
The next digit of our result is 5. 
Result so far: 106623.55
Subtract 2605 from 2850 to get 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

In conclusion, the division gives 106623.55 with a balance of 0.245.