We look at the division of 79305005 by 21 
Let's see how many times 21 fits into 79305005.

Going ahead to step 1:
21 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 21

Moving on to step 2:
When dividing 79 by 21, we get 3 with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 16 after subtracting 63 from 79.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 21

Let's proceed to step 3:
21 can be fit into 163 7 times, resulting in a remainder of 16.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
Subtracting 147 from 163 leaves us with 16.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 21

Step 4:
If we divide 160 by 21, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 377.0
Deduct 147 from 160 and we're left with 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 21

Step 5:
If we divide 135 by 21, we get 6 and a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 3776.0
Subtracting 126 from 135 leaves us with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 21

Let's proceed to step 6:
When dividing 90 by 21, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 37764.0
If we subtract 84 from 90, we get 6.
Fetch the next digit (0) from the dividend, attach it to 6 and continue: 60 / 21

Let's proceed to step 7:
If we divide 60 by 21, we get 2 and a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 377642.0
Subtracting 42 from 60 leaves us with 18.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 21

On to step 8:
When dividing 185 by 21, we get 8 with a remainder of 17.
The next digit of our result is 8. 
Result so far: 3776428.0
If we subtract 168 from 185, 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.

On to step 9:
When dividing 170 by 21, we get 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 3776428.8
If we take 168 away from 170, we end up 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.

Advancing to step 10:
When dividing 20 by 21, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 3776428.8
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.

Moving 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: 3776428.809
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:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 3776428.8095
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 13:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 3776428.80952
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.

On to step 14:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 3776428.809523
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 15:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 3776428.8095238
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 16:
21 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 3776428.8095238
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.

In conclusion, the division gives 3776428.8095238 with a balance of 2e-08.