We look at the division of 917858 by 86 
Let's see how many times 86 fits into 917858.

Advancing to step 1:
If we divide 9 by 86, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 86

Step 2:
91 divided by 86 is 1 with a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 86 from 91 to get 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 86

Step 3:
When dividing 57 by 86, we get 0 with a remainder of 57.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 57, we end up with 57.
Include the next digit (8) from the dividend after 57, then repeat: 578 / 86

Let's proceed to step 4:
86 goes into 578 6 times with a remainder of 62.
Write down 6 as next digit of the result. 
Result so far: 106.0
Subtract 516 from 578 to get 62.
Bring next digit (5) of the dividend behind the 62 and repeat the process: 625 / 86

Moving on to step 5:
The number 86 fits into 625 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 1067.0
Subtract 602 from 625 to get 23.
Grab the next digit (8) from the dividend, add it to 23, then carry on: 238 / 86

Going ahead to step 6:
When dividing 238 by 86, we get 2 with a remainder of 66.
Put 2 as the next digit of the answer. 
Result so far: 10672.0
Subtract 172 from 238 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 7:
86 can be fit into 660 7 times, resulting in a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 10672.7
If we subtract 602 from 660, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 8:
86 can be fit into 580 6 times, resulting in a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 10672.76
Subtracting 516 from 580 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
The number 86 fits into 640 7 times, leaving a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 10672.767
Deduct 602 from 640 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
86 goes into 380 4 times with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 10672.7674
The remainder is 36 after subtracting 344 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 11:
The number 86 fits into 360 4 times, leaving a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 10672.76744
Subtracting 344 from 360 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 10672.76744 with a remainder of 1.6e-05.