9499 divided by 21 
Let's see how many times 21 fits into 9499.

Advancing to step 1:
9 divided by 21 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (4) from the dividend to 9 and continue with: 94 / 21

Step 2:
When dividing 94 by 21, we get 4 with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 10 after subtracting 84 from 94.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 21

Going ahead to step 3:
21 goes into 109 5 times with a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 45.0
If we subtract 105 from 109, we get 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 21

Moving on to step 4:
21 goes into 49 2 times with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 452.0
Deduct 42 from 49 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 5:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 452.3
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 6:
21 can be fit into 70 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 452.33
Deduct 63 from 70 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The quotient of the division is 452.33, and the remainder is 0.007.