266531 ÷ 80 
Our goal is to divide 266531 by 80.

Going ahead to step 1:
When dividing 2 by 80, we get 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 (6) from the dividend and append it to 2, then repeat: 26 / 80

Going ahead to step 2:
The number 80 fits into 26 0 times, leaving a remainder of 26.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 26 and we're left with 26.
Append the next digit (6) from the dividend to 26 and continue with: 266 / 80

Advancing to step 3:
If we divide 266 by 80, we get 3 and a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 240 from 266 to get 26.
Append the next digit (5) from the dividend to 26 and continue with: 265 / 80

Let's proceed to step 4:
If we divide 265 by 80, we get 3 and a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Deduct 240 from 265 and we're left with 25.
Fetch the next digit (3) from the dividend, attach it to 25 and continue: 253 / 80

Advancing to step 5:
253 divided by 80 is 3 with a remainder of 13.
The next digit of our result is 3. 
Result so far: 333.0
Subtracting 240 from 253 leaves us with 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 80

Advancing to step 6:
80 can be fit into 131 1 times, resulting in a remainder of 51.
The number 1 becomes the next digit in our result. 
Result so far: 3331.0
Subtracting 80 from 131 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 7:
When dividing 510 by 80, we get 6 with a remainder of 30.
The next digit of our result is 6. 
Result so far: 3331.6
Subtracting 480 from 510 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
300 divided by 80 is 3 with a remainder of 60.
Record the quotient 3 as the next digit in the result. 
Result so far: 3331.63
Deduct 240 from 300 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 9:
The number 80 fits into 600 7 times, leaving a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 3331.637
Deduct 560 from 600 and we're left 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 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 3331.6375
If we subtract 400 from 400, we get 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 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3331.6375
If we subtract 0 from 0, we get 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 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3331.6375
If we take 0 away from 0, 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.

After the division, we end up with 3331.6375 and a remainder of 0.0.