870669 ÷ 80 
We want to divide 870669 by 80.

Let's proceed to step 1:
If we divide 8 by 80, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 80

Let's proceed to step 2:
87 divided by 80 is 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 7 after subtracting 80 from 87.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 80

On to step 3:
When dividing 70 by 80, we get 0 with a remainder of 70.
The next digit of our result is 0. 
Result so far: 10.0
Subtracting 0 from 70 leaves us with 70.
Grab the next digit (6) from the dividend, add it to 70, then carry on: 706 / 80

On to step 4:
706 divided by 80 is 8 with a remainder of 66.
Write down 8 as next digit of the result. 
Result so far: 108.0
Subtract 640 from 706 to get 66.
Append the next digit (6) from the dividend to 66 and continue with: 666 / 80

Advancing to step 5:
If we divide 666 by 80, we get 8 and a remainder of 26.
The next digit of our result is 8. 
Result so far: 1088.0
If we subtract 640 from 666, we get 26.
Bring next digit (9) of the dividend behind the 26 and repeat the process: 269 / 80

Moving on to step 6:
80 goes into 269 3 times with a remainder of 29.
Write down 3 as next digit of the result. 
Result so far: 10883.0
Subtract 240 from 269 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 7:
80 can be fit into 290 3 times, resulting in a remainder of 50.
Record the quotient 3 as the next digit in the result. 
Result so far: 10883.3
If we take 240 away from 290, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
500 divided by 80 is 6 with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 10883.36
Subtracting 480 from 500 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
80 can be fit into 200 2 times, resulting in a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 10883.362
If we take 160 away from 200, 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.

Step 10:
When dividing 400 by 80, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 10883.3625
Deduct 400 from 400 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.

Advancing to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10883.3625
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.

On to step 12:
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: 10883.3625
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.

The final outcome is 10883.3625, with a leftover of 0.0.