We look at the division of 55425818 by 21 
We want to figure out the number of times 55425818 can be divided by 21.

On to step 1:
The number 21 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
Subtracting 0 from 5 leaves us with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 21

On to step 2:
21 goes into 55 2 times with a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 13 after subtracting 42 from 55.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

On to step 3:
If we divide 134 by 21, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 26.0
Deduct 126 from 134 and we're left with 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 21

Moving on to step 4:
21 can be fit into 82 3 times, resulting in a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 263.0
Deduct 63 from 82 and we're left with 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 21

Step 5:
21 goes into 195 9 times with a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 2639.0
Subtract 189 from 195 to get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 21

Going ahead to step 6:
68 divided by 21 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 26393.0
Subtracting 63 from 68 leaves us with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 21

Going ahead to step 7:
21 can be fit into 51 2 times, resulting in a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 263932.0
Subtracting 42 from 51 leaves us with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 21

Going ahead to step 8:
If we divide 98 by 21, we get 4 and a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 2639324.0
The remainder is 14 after subtracting 84 from 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
140 divided by 21 is 6 with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 2639324.6
Subtract 126 from 140 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 10:
If we divide 140 by 21, we get 6 and a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 2639324.66
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

In conclusion, the division gives 2639324.66 with a balance of 0.014.