We're dividing 21256079 by 800 
We want to figure out the number of times 21256079 can be divided by 800.

Moving on to step 1:
800 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 800

Let's proceed to step 2:
800 goes into 21 0 times with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 800

Step 3:
800 goes into 212 0 times with a remainder of 212.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 212 to get 212.
Bring next digit (5) of the dividend behind the 212 and repeat the process: 2125 / 800

Moving on to step 4:
The number 800 fits into 2125 2 times, leaving a remainder of 525.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 1600 from 2125, we get 525.
Include the next digit (6) from the dividend after 525, then repeat: 5256 / 800

On to step 5:
The number 800 fits into 5256 6 times, leaving a remainder of 456.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Subtract 4800 from 5256 to get 456.
Bring next digit (0) of the dividend behind the 456 and repeat the process: 4560 / 800

Advancing to step 6:
800 goes into 4560 5 times with a remainder of 560.
Put 5 as the next digit of the answer. 
Result so far: 265.0
The remainder is 560 after subtracting 4000 from 4560.
Fetch the next digit (7) from the dividend, attach it to 560 and continue: 5607 / 800

Moving on to step 7:
If we divide 5607 by 800, we get 7 and a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 2657.0
If we take 5600 away from 5607, we end up with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 800

On to step 8:
If we divide 79 by 800, we get 0 and a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 26570.0
If we take 0 away from 79, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 9:
790 divided by 800 is 0 with a remainder of 790.
The number 0 becomes the next digit in our result. 
Result so far: 26570.0
If we subtract 0 from 790, we get 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Let's proceed to step 10:
7900 divided by 800 is 9 with a remainder of 700.
The next digit of our result is 9. 
Result so far: 26570.09
Deduct 7200 from 7900 and we're left with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Advancing to step 11:
When dividing 7000 by 800, we get 8 with a remainder of 600.
Write down 8 as next digit of the result. 
Result so far: 26570.098
Deduct 6400 from 7000 and we're left with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Going ahead to step 12:
When dividing 6000 by 800, we get 7 with a remainder of 400.
The number 7 becomes the next digit in our result. 
Result so far: 26570.0987
Subtracting 5600 from 6000 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 13:
800 goes into 4000 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 26570.09875
Deduct 4000 from 4000 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 14:
If we divide 0 by 800, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 26570.09875
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 15:
0 divided by 800 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 26570.09875
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 26570.09875 and a remainder of 0.0.