We divide 300494 by 21
We want to figure out the number of times 300494 can be divided by 21.

Moving on to step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 21

Let's proceed to step 2:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 9 after subtracting 21 from 30.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 21

Advancing to step 3:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 14.0
The remainder is 6 after subtracting 84 from 90.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 21

Step 4:
If we divide 64 by 21, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 143.0
Subtracting 63 from 64 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 21

Let's proceed to step 5:
If we divide 19 by 21, we get 0 and a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 1430.0
If we subtract 0 from 19, we get 19.
Include the next digit (4) from the dividend after 19, then repeat: 194 / 21

Going ahead to step 6:
If we divide 194 by 21, we get 9 and a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 14309.0
The remainder is 5 after subtracting 189 from 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
50 divided by 21 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 14309.2
If we subtract 42 from 50, we 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.

Moving on to step 8:
21 goes into 80 3 times with a remainder of 17.
The next digit of our result is 3. 
Result so far: 14309.23
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 9:
21 goes into 170 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 14309.238
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.

Let's proceed to step 10:
When dividing 20 by 21, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 14309.238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
When dividing 200 by 21, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 14309.23809
Deduct 189 from 200 and we're left 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.

Step 12:
110 divided by 21 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 14309.238095
Subtracting 105 from 110 leaves us 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.

Moving on to step 13:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 14309.2380952
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.

Moving on to step 14:
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: 14309.23809523
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.

After the division, we end up with 14309.23809523 and a remainder of 1.7e-08.