21821085 ÷ 778 
We're looking to find how many times 778 goes into 21821085.

Moving on to step 1:
2 divided by 778 is 0 with 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.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 778

Advancing to step 2:
778 can be fit into 21 0 times, resulting in a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (8) of the dividend behind the 21 and repeat the process: 218 / 778

Let's proceed to step 3:
778 can be fit into 218 0 times, resulting in a remainder of 218.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 218, we get 218.
Bring next digit (2) of the dividend behind the 218 and repeat the process: 2182 / 778

Step 4:
When dividing 2182 by 778, we get 2 with a remainder of 626.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 1556 from 2182 and we're left with 626.
Append the next digit (1) from the dividend to 626 and continue with: 6261 / 778

Going ahead to step 5:
The number 778 fits into 6261 8 times, leaving a remainder of 37.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Deduct 6224 from 6261 and we're left with 37.
Grab the next digit (0) from the dividend, add it to 37, then carry on: 370 / 778

Going ahead to step 6:
778 can be fit into 370 0 times, resulting in a remainder of 370.
Put 0 as the next digit of the answer. 
Result so far: 280.0
Subtracting 0 from 370 leaves us with 370.
Include the next digit (8) from the dividend after 370, then repeat: 3708 / 778

Step 7:
The number 778 fits into 3708 4 times, leaving a remainder of 596.
The next digit of our result is 4. 
Result so far: 2804.0
If we take 3112 away from 3708, we end up with 596.
Grab the next digit (5) from the dividend, add it to 596, then carry on: 5965 / 778

Moving on to step 8:
778 can be fit into 5965 7 times, resulting in a remainder of 519.
The next digit of our result is 7. 
Result so far: 28047.0
Subtracting 5446 from 5965 leaves us with 519.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5190, and continue the process.

Let's proceed to step 9:
778 goes into 5190 6 times with a remainder of 522.
Write down 6 as next digit of the result. 
Result so far: 28047.6
The remainder is 522 after subtracting 4668 from 5190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Step 10:
778 goes into 5220 6 times with a remainder of 552.
Write down 6 as next digit of the result. 
Result so far: 28047.66
Subtract 4668 from 5220 to get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

The final outcome is 28047.66, with a leftover of 0.552.