498829 divided by 21 
We want to figure out the number of times 498829 can be divided by 21.

Advancing to step 1:
When dividing 4 by 21, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 21

Let's proceed to step 2:
21 goes into 49 2 times with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 42 from 49, we get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 21

Let's proceed to step 3:
If we divide 78 by 21, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
The remainder is 15 after subtracting 63 from 78.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 21

Moving on to step 4:
21 can be fit into 158 7 times, resulting in a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 237.0
The remainder is 11 after subtracting 147 from 158.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 21

Let's proceed to step 5:
The number 21 fits into 112 5 times, leaving a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 2375.0
If we take 105 away from 112, we end up with 7.
Take the next digit (9) from the dividend and append it to 7, then repeat: 79 / 21

Going ahead to step 6:
79 divided by 21 is 3 with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 23753.0
If we take 63 away from 79, we end up 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.

Let's proceed to step 7:
When dividing 160 by 21, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 23753.7
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 8:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 23753.76
Deduct 126 from 130 and we're left 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.

Moving on to step 9:
When dividing 40 by 21, we get 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 23753.761
Deduct 21 from 40 and we're left with 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.
Put 9 as the next digit of the answer. 
Result so far: 23753.7619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 11:
21 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 23753.7619
Deduct 0 from 10 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.

Let's proceed to step 12:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 23753.761904
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.

Step 13:
If we divide 160 by 21, we get 7 and a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 23753.7619047
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.

Step 14:
130 divided by 21 is 6 with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 23753.76190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 23753.76190476 with a remaining 4e-09.