858477 ÷ 80 
We want to divide 858477 by 80.

Step 1:
80 can be fit into 8 0 times, resulting in 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 (5) from the dividend, attach it to 8 and continue: 85 / 80

On to step 2:
85 divided by 80 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 80 from 85 leaves us with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 80

Going ahead to step 3:
If we divide 58 by 80, we get 0 and a remainder of 58.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 58 to get 58.
Include the next digit (4) from the dividend after 58, then repeat: 584 / 80

Let's proceed to step 4:
80 goes into 584 7 times with a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 107.0
Subtract 560 from 584 to get 24.
Bring next digit (7) of the dividend behind the 24 and repeat the process: 247 / 80

Step 5:
If we divide 247 by 80, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 1073.0
If we take 240 away from 247, we end up with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 80

Let's proceed to step 6:
When dividing 77 by 80, we get 0 with a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 10730.0
If we subtract 0 from 77, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 7:
When dividing 770 by 80, we get 9 with a remainder of 50.
The next digit of our result is 9. 
Result so far: 10730.9
Deduct 720 from 770 and we're left 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.

Step 8:
500 divided by 80 is 6 with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 10730.96
If we subtract 480 from 500, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
The number 80 fits into 200 2 times, leaving a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 10730.962
Subtract 160 from 200 to get 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:
80 goes into 400 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 10730.9625
Subtract 400 from 400 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.

Advancing to step 11:
80 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10730.9625
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.

Step 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 10730.9625
Subtract 0 from 0 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.

The final result is 10730.9625 with a remainder of 0.0.