28759 ÷ 21 
Let's see how many times 21 fits into 28759.

On to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Let's proceed to step 2:
If we divide 28 by 21, we get 1 and a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 28 and we're left with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 21

Step 3:
If we divide 77 by 21, we get 3 and a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 63 away from 77, we end up with 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 21

On to step 4:
21 can be fit into 145 6 times, resulting in a remainder of 19.
Put 6 as the next digit of the answer. 
Result so far: 136.0
The remainder is 19 after subtracting 126 from 145.
Take the next digit (9) from the dividend and append it to 19, then repeat: 199 / 21

Step 5:
If we divide 199 by 21, we get 9 and a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 1369.0
Deduct 189 from 199 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 6:
21 goes into 100 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 1369.4
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 1369.47
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
When dividing 130 by 21, we get 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 1369.476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 1369.4761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 10:
21 goes into 190 9 times with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 1369.47619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 1369.47619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
100 divided by 21 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 1369.4761904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 1369.47619047
Subtracting 147 from 160 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Our division results in 1369.47619047 with a remaining 1.3e-08.