20778315 ÷ 80 
We want to divide 20778315 by 80.

Moving on to step 1:
The number 80 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 80

Moving on to step 2:
80 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Grab the next digit (7) from the dividend, add it to 20, then carry on: 207 / 80

Step 3:
80 can be fit into 207 2 times, resulting in a remainder of 47.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 160 from 207 and we're left with 47.
Append the next digit (7) from the dividend to 47 and continue with: 477 / 80

Let's proceed to step 4:
80 can be fit into 477 5 times, resulting in a remainder of 77.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
If we subtract 400 from 477, we get 77.
Grab the next digit (8) from the dividend, add it to 77, then carry on: 778 / 80

Advancing to step 5:
80 can be fit into 778 9 times, resulting in a remainder of 58.
The next digit of our result is 9. 
Result so far: 259.0
If we take 720 away from 778, we end up with 58.
Grab the next digit (3) from the dividend, add it to 58, then carry on: 583 / 80

Advancing to step 6:
The number 80 fits into 583 7 times, leaving a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 2597.0
If we subtract 560 from 583, we get 23.
Include the next digit (1) from the dividend after 23, then repeat: 231 / 80

Advancing to step 7:
If we divide 231 by 80, we get 2 and a remainder of 71.
Use 2 as the next digit of our solution. 
Result so far: 25972.0
Subtracting 160 from 231 leaves us with 71.
Take the next digit (5) from the dividend and append it to 71, then repeat: 715 / 80

Let's proceed to step 8:
715 divided by 80 is 8 with a remainder of 75.
The next digit of our result is 8. 
Result so far: 259728.0
Subtract 640 from 715 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 9:
80 goes into 750 9 times with a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 259728.9
Subtract 720 from 750 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
The number 80 fits into 300 3 times, leaving a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 259728.93
The remainder is 60 after subtracting 240 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 11:
80 goes into 600 7 times with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 259728.937
If we take 560 away from 600, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 12:
80 goes into 400 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 259728.9375
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 13:
If we divide 0 by 80, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 259728.9375
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 14:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 259728.9375
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 259728.9375 and a remainder of 0.0.