86840454 ÷ 915 
We want to divide 86840454 by 915.

Moving on to step 1:
If we divide 8 by 915, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 915

Going ahead to step 2:
915 goes into 86 0 times with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Take the next digit (8) from the dividend and append it to 86, then repeat: 868 / 915

Moving on to step 3:
When dividing 868 by 915, we get 0 with a remainder of 868.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 868 to get 868.
Append the next digit (4) from the dividend to 868 and continue with: 8684 / 915

On to step 4:
The number 915 fits into 8684 9 times, leaving a remainder of 449.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 449 after subtracting 8235 from 8684.
Include the next digit (0) from the dividend after 449, then repeat: 4490 / 915

Step 5:
When dividing 4490 by 915, we get 4 with a remainder of 830.
Put 4 as the next digit of the answer. 
Result so far: 94.0
The remainder is 830 after subtracting 3660 from 4490.
Take the next digit (4) from the dividend and append it to 830, then repeat: 8304 / 915

Moving on to step 6:
If we divide 8304 by 915, we get 9 and a remainder of 69.
Record the quotient 9 as the next digit in the result. 
Result so far: 949.0
Deduct 8235 from 8304 and we're left with 69.
Grab the next digit (5) from the dividend, add it to 69, then carry on: 695 / 915

Moving on to step 7:
If we divide 695 by 915, we get 0 and a remainder of 695.
The next digit of our result is 0. 
Result so far: 9490.0
Subtract 0 from 695 to get 695.
Fetch the next digit (4) from the dividend, attach it to 695 and continue: 6954 / 915

Let's proceed to step 8:
915 goes into 6954 7 times with a remainder of 549.
Record the quotient 7 as the next digit in the result. 
Result so far: 94907.0
If we take 6405 away from 6954, we end up with 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

On to step 9:
5490 divided by 915 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 94907.6
Subtracting 5490 from 5490 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.

Going ahead to step 10:
0 divided by 915 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 94907.6
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.

Going ahead to step 11:
915 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 94907.6
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.

The final outcome is 94907.6, with a leftover of 0.0.