We divide 86843992 by 80
We want to divide 86843992 by 80.

Moving on to step 1:
The number 80 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 80

Moving on to step 2:
80 goes into 86 1 times with a remainder of 6.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 80 from 86 and we're left with 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 80

Step 3:
80 goes into 68 0 times with a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 68 to get 68.
Fetch the next digit (4) from the dividend, attach it to 68 and continue: 684 / 80

Step 4:
The number 80 fits into 684 8 times, leaving a remainder of 44.
Record the quotient 8 as the next digit in the result. 
Result so far: 108.0
If we take 640 away from 684, we end up with 44.
Fetch the next digit (3) from the dividend, attach it to 44 and continue: 443 / 80

Advancing to step 5:
80 goes into 443 5 times with a remainder of 43.
Put 5 as the next digit of the answer. 
Result so far: 1085.0
The remainder is 43 after subtracting 400 from 443.
Grab the next digit (9) from the dividend, add it to 43, then carry on: 439 / 80

Going ahead to step 6:
When dividing 439 by 80, we get 5 with a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 10855.0
Subtract 400 from 439 to get 39.
Grab the next digit (9) from the dividend, add it to 39, then carry on: 399 / 80

Going ahead to step 7:
80 can be fit into 399 4 times, resulting in a remainder of 79.
The next digit of our result is 4. 
Result so far: 108554.0
Subtract 320 from 399 to get 79.
Append the next digit (2) from the dividend to 79 and continue with: 792 / 80

Step 8:
When dividing 792 by 80, we get 9 with a remainder of 72.
Put 9 as the next digit of the answer. 
Result so far: 1085549.0
If we take 720 away from 792, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
80 can be fit into 720 9 times, resulting in a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 1085549.9
Subtract 720 from 720 to 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.

Let's proceed to step 10:
The number 80 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1085549.9
The remainder is 0 after subtracting 0 from 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 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1085549.9
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 1085549.9 with a remainder of 0.0.