80940507 ÷ 858 
Let's see how many times 858 fits into 80940507.

Advancing to step 1:
858 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
Subtract 0 from 8 to get 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 858

On to step 2:
If we divide 80 by 858, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Take the next digit (9) from the dividend and append it to 80, then repeat: 809 / 858

Moving on to step 3:
858 can be fit into 809 0 times, resulting in a remainder of 809.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 809 and we're left with 809.
Bring next digit (4) of the dividend behind the 809 and repeat the process: 8094 / 858

Going ahead to step 4:
When dividing 8094 by 858, we get 9 with a remainder of 372.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 7722 from 8094 to get 372.
Grab the next digit (0) from the dividend, add it to 372, then carry on: 3720 / 858

Step 5:
858 goes into 3720 4 times with a remainder of 288.
The next digit of our result is 4. 
Result so far: 94.0
Subtracting 3432 from 3720 leaves us with 288.
Grab the next digit (5) from the dividend, add it to 288, then carry on: 2885 / 858

Advancing to step 6:
858 goes into 2885 3 times with a remainder of 311.
Use 3 as the next digit of our solution. 
Result so far: 943.0
Subtracting 2574 from 2885 leaves us with 311.
Bring next digit (0) of the dividend behind the 311 and repeat the process: 3110 / 858

Step 7:
858 can be fit into 3110 3 times, resulting in a remainder of 536.
The number 3 becomes the next digit in our result. 
Result so far: 9433.0
Subtracting 2574 from 3110 leaves us with 536.
Bring next digit (7) of the dividend behind the 536 and repeat the process: 5367 / 858

Let's proceed to step 8:
5367 divided by 858 is 6 with a remainder of 219.
The next digit of our result is 6. 
Result so far: 94336.0
Subtract 5148 from 5367 to get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Let's proceed to step 9:
If we divide 2190 by 858, we get 2 and a remainder of 474.
The number 2 becomes the next digit in our result. 
Result so far: 94336.2
Subtracting 1716 from 2190 leaves us with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Going ahead to step 10:
858 goes into 4740 5 times with a remainder of 450.
Write down 5 as next digit of the result. 
Result so far: 94336.25
Deduct 4290 from 4740 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Moving on to step 11:
If we divide 4500 by 858, we get 5 and a remainder of 210.
Put 5 as the next digit of the answer. 
Result so far: 94336.255
If we take 4290 away from 4500, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

The final outcome is 94336.255, with a leftover of 0.021.