210816 ÷ 80 
Our goal is to divide 210816 by 80.

Going ahead to step 1:
The number 80 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 80

Let's proceed to step 2:
21 divided by 80 is 0 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 (0) from the dividend, add it to 21, then carry on: 210 / 80

Moving on to step 3:
210 divided by 80 is 2 with a remainder of 50.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 160 away from 210, we end up with 50.
Bring next digit (8) of the dividend behind the 50 and repeat the process: 508 / 80

Let's proceed to step 4:
The number 80 fits into 508 6 times, leaving a remainder of 28.
Write down 6 as next digit of the result. 
Result so far: 26.0
The remainder is 28 after subtracting 480 from 508.
Take the next digit (1) from the dividend and append it to 28, then repeat: 281 / 80

Advancing to step 5:
The number 80 fits into 281 3 times, leaving a remainder of 41.
The next digit of our result is 3. 
Result so far: 263.0
If we subtract 240 from 281, we get 41.
Include the next digit (6) from the dividend after 41, then repeat: 416 / 80

Advancing to step 6:
If we divide 416 by 80, we get 5 and a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 2635.0
Subtract 400 from 416 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 7:
If we divide 160 by 80, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2635.2
If we take 160 away from 160, we end up 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.

Going ahead to step 8:
80 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2635.2
Deduct 0 from 0 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.

Moving on to step 9:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2635.2
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.

Our division results in 2635.2 with a remaining 0.0.