Let's divide 21490 by 55
Let's see how many times 55 fits into 21490.

On to step 1:
The number 55 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 55

Moving on to step 2:
The number 55 fits into 21 0 times, leaving a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 55

Going ahead to step 3:
The number 55 fits into 214 3 times, leaving a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 165 from 214 to get 49.
Bring next digit (9) of the dividend behind the 49 and repeat the process: 499 / 55

Going ahead to step 4:
The number 55 fits into 499 9 times, leaving a remainder of 4.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we take 495 away from 499, we end up with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 55

Let's proceed to step 5:
55 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 390.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 6:
If we divide 400 by 55, we get 7 and a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 390.7
The remainder is 15 after subtracting 385 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
150 divided by 55 is 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 390.72
Deduct 110 from 150 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
400 divided by 55 is 7 with a remainder of 15.
The next digit of our result is 7. 
Result so far: 390.727
Subtracting 385 from 400 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 9:
55 can be fit into 150 2 times, resulting in a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 390.7272
If we subtract 110 from 150, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
When dividing 400 by 55, we get 7 with a remainder of 15.
The number 7 becomes the next digit in our result. 
Result so far: 390.72727
If we take 385 away from 400, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
The number 55 fits into 150 2 times, leaving a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 390.727272
The remainder is 40 after subtracting 110 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
55 goes into 400 7 times with a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 390.7272727
Subtract 385 from 400 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 13:
150 divided by 55 is 2 with a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 390.72727272
If we take 110 away from 150, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 390.72727272, with a leftover of 4e-08.