89219 ÷ 21 
We want to divide 89219 by 21.

On to step 1:
21 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 21

Going ahead to step 2:
21 goes into 89 4 times with a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 84 away from 89, we end up with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 21

Moving on to step 3:
21 goes into 52 2 times with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 42.0
If we subtract 42 from 52, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 21

Step 4:
When dividing 101 by 21, we get 4 with a remainder of 17.
Use 4 as the next digit of our solution. 
Result so far: 424.0
Subtracting 84 from 101 leaves us with 17.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 21

Moving on to step 5:
179 divided by 21 is 8 with a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 4248.0
The remainder is 11 after subtracting 168 from 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 6:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 4248.5
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 7:
When dividing 50 by 21, we get 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 4248.52
Deduct 42 from 50 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
If we divide 80 by 21, we get 3 and a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 4248.523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 9:
If we divide 170 by 21, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 4248.5238
Subtracting 168 from 170 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.

Moving on to step 10:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 4248.5238
The remainder is 20 after subtracting 0 from 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 11:
200 divided by 21 is 9 with a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 4248.523809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 12:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 4248.5238095
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 13:
50 divided by 21 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 4248.52380952
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 4248.52380952, with a leftover of 8e-09.