We're dividing 280655 by 21 
We want to divide 280655 by 21.

Going ahead to step 1:
21 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Let's proceed to step 2:
When dividing 28 by 21, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 21 from 28 and we're left with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 21

On to step 3:
If we divide 70 by 21, we get 3 and a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 63 from 70 leaves us with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 21

Let's proceed to step 4:
When dividing 76 by 21, we get 3 with a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 133.0
If we take 63 away from 76, we end up with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 21

Moving on to step 5:
135 divided by 21 is 6 with a remainder of 9.
The next digit of our result is 6. 
Result so far: 1336.0
Subtracting 126 from 135 leaves us with 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 21

Going ahead to step 6:
The number 21 fits into 95 4 times, leaving a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 13364.0
Subtracting 84 from 95 leaves us 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 7:
If we divide 110 by 21, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 13364.5
Deduct 105 from 110 and we're left 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.

Going ahead to step 8:
21 goes into 50 2 times with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 13364.52
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.

On to step 9:
When dividing 80 by 21, we get 3 with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 13364.523
Deduct 63 from 80 and we're left 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 10:
If we divide 170 by 21, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 13364.5238
Deduct 168 from 170 and we're left 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.

Going ahead to step 11:
The number 21 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 13364.5238
If we take 0 away from 20, we end up 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 12:
If we divide 200 by 21, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 13364.523809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
21 goes into 110 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 13364.5238095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
The number 21 fits into 50 2 times, leaving a remainder of 8.
The next digit of our result is 2. 
Result so far: 13364.52380952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Our division results in 13364.52380952 with a remaining 8e-09.