Let's divide 55555838 by 21
Let's see how many times 21 fits into 55555838.

Let's proceed to step 1:
21 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 21

Let's proceed to step 2:
When dividing 55 by 21, we get 2 with a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 13 after subtracting 42 from 55.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 21

On to step 3:
135 divided by 21 is 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 26.0
Deduct 126 from 135 and we're left with 9.
Append the next digit (5) from the dividend to 9 and continue with: 95 / 21

Advancing to step 4:
21 can be fit into 95 4 times, resulting in a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 264.0
If we subtract 84 from 95, we get 11.
Bring next digit (5) of the dividend behind the 11 and repeat the process: 115 / 21

On to step 5:
115 divided by 21 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 2645.0
If we take 105 away from 115, we end up with 10.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 21

On to step 6:
The number 21 fits into 108 5 times, leaving a remainder of 3.
The next digit of our result is 5. 
Result so far: 26455.0
If we subtract 105 from 108, we get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 21

On to step 7:
When dividing 33 by 21, we get 1 with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 264551.0
The remainder is 12 after subtracting 21 from 33.
Grab the next digit (8) from the dividend, add it to 12, then carry on: 128 / 21

Step 8:
128 divided by 21 is 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 2645516.0
Subtracting 126 from 128 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
21 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 2645516.0
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 10:
When dividing 200 by 21, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 2645516.09
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
110 divided by 21 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 2645516.095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 12:
21 goes into 50 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 2645516.0952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
80 divided by 21 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 2645516.09523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 2645516.095238
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 15:
If we divide 20 by 21, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 2645516.095238
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 16:
21 goes into 200 9 times with a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 2645516.09523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final result is 2645516.09523809 with a remainder of 1.1e-08.