We're dividing 21058279 by 300 
We're looking to find how many times 300 goes into 21058279.

On to step 1:
If we divide 2 by 300, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 300

Step 2:
300 goes into 21 0 times with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 300

On to step 3:
The number 300 fits into 210 0 times, leaving a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 210 leaves us with 210.
Bring next digit (5) of the dividend behind the 210 and repeat the process: 2105 / 300

Advancing to step 4:
When dividing 2105 by 300, we get 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we subtract 2100 from 2105, we get 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 300

Advancing to step 5:
When dividing 58 by 300, we get 0 with a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 70.0
If we take 0 away from 58, we end up with 58.
Take the next digit (2) from the dividend and append it to 58, then repeat: 582 / 300

Going ahead to step 6:
300 goes into 582 1 times with a remainder of 282.
Use 1 as the next digit of our solution. 
Result so far: 701.0
Subtracting 300 from 582 leaves us with 282.
Append the next digit (7) from the dividend to 282 and continue with: 2827 / 300

On to step 7:
2827 divided by 300 is 9 with a remainder of 127.
Write down 9 as next digit of the result. 
Result so far: 7019.0
If we take 2700 away from 2827, we end up with 127.
Bring next digit (9) of the dividend behind the 127 and repeat the process: 1279 / 300

Let's proceed to step 8:
The number 300 fits into 1279 4 times, leaving a remainder of 79.
Put 4 as the next digit of the answer. 
Result so far: 70194.0
If we subtract 1200 from 1279, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 9:
300 goes into 790 2 times with a remainder of 190.
Put 2 as the next digit of the answer. 
Result so far: 70194.2
Subtracting 600 from 790 leaves us with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 10:
300 goes into 1900 6 times with a remainder of 100.
Use 6 as the next digit of our solution. 
Result so far: 70194.26
If we take 1800 away from 1900, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 11:
When dividing 1000 by 300, we get 3 with a remainder of 100.
Put 3 as the next digit of the answer. 
Result so far: 70194.263
The remainder is 100 after subtracting 900 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 12:
The number 300 fits into 1000 3 times, leaving a remainder of 100.
Use 3 as the next digit of our solution. 
Result so far: 70194.2633
If we take 900 away from 1000, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

In conclusion, the division gives 70194.2633 with a balance of 0.001.