We look at the division of 86150711 by 258 
We want to divide 86150711 by 258.

Step 1:
258 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 (6) from the dividend, attach it to 8 and continue: 86 / 258

Going ahead to step 2:
If we divide 86 by 258, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Include the next digit (1) from the dividend after 86, then repeat: 861 / 258

On to step 3:
258 can be fit into 861 3 times, resulting in a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 774 from 861 and we're left with 87.
Bring next digit (5) of the dividend behind the 87 and repeat the process: 875 / 258

Let's proceed to step 4:
The number 258 fits into 875 3 times, leaving a remainder of 101.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Subtract 774 from 875 to get 101.
Append the next digit (0) from the dividend to 101 and continue with: 1010 / 258

On to step 5:
1010 divided by 258 is 3 with a remainder of 236.
The next digit of our result is 3. 
Result so far: 333.0
The remainder is 236 after subtracting 774 from 1010.
Append the next digit (7) from the dividend to 236 and continue with: 2367 / 258

Going ahead to step 6:
When dividing 2367 by 258, we get 9 with a remainder of 45.
The number 9 becomes the next digit in our result. 
Result so far: 3339.0
Subtracting 2322 from 2367 leaves us with 45.
Include the next digit (1) from the dividend after 45, then repeat: 451 / 258

Step 7:
When dividing 451 by 258, we get 1 with a remainder of 193.
The next digit of our result is 1. 
Result so far: 33391.0
The remainder is 193 after subtracting 258 from 451.
Append the next digit (1) from the dividend to 193 and continue with: 1931 / 258

On to step 8:
If we divide 1931 by 258, we get 7 and a remainder of 125.
The number 7 becomes the next digit in our result. 
Result so far: 333917.0
The remainder is 125 after subtracting 1806 from 1931.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Going ahead to step 9:
258 goes into 1250 4 times with a remainder of 218.
Write down 4 as next digit of the result. 
Result so far: 333917.4
If we subtract 1032 from 1250, we get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 10:
258 goes into 2180 8 times with a remainder of 116.
The next digit of our result is 8. 
Result so far: 333917.48
Subtract 2064 from 2180 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Advancing to step 11:
When dividing 1160 by 258, we get 4 with a remainder of 128.
Use 4 as the next digit of our solution. 
Result so far: 333917.484
Deduct 1032 from 1160 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 12:
The number 258 fits into 1280 4 times, leaving a remainder of 248.
Record the quotient 4 as the next digit in the result. 
Result so far: 333917.4844
Deduct 1032 from 1280 and we're left with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

The final result is 333917.4844 with a remainder of 0.00248.