86385093 ÷ 258 
Our goal is to divide 86385093 by 258.

Step 1:
8 divided by 258 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 258

On to step 2:
86 divided by 258 is 0 with a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Include the next digit (3) from the dividend after 86, then repeat: 863 / 258

Going ahead to step 3:
The number 258 fits into 863 3 times, leaving a remainder of 89.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 774 from 863 and we're left with 89.
Bring next digit (8) of the dividend behind the 89 and repeat the process: 898 / 258

Going ahead to step 4:
898 divided by 258 is 3 with a remainder of 124.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
The remainder is 124 after subtracting 774 from 898.
Append the next digit (5) from the dividend to 124 and continue with: 1245 / 258

Going ahead to step 5:
258 can be fit into 1245 4 times, resulting in a remainder of 213.
The number 4 becomes the next digit in our result. 
Result so far: 334.0
The remainder is 213 after subtracting 1032 from 1245.
Bring next digit (0) of the dividend behind the 213 and repeat the process: 2130 / 258

Step 6:
258 goes into 2130 8 times with a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 3348.0
Subtract 2064 from 2130 to get 66.
Bring next digit (9) of the dividend behind the 66 and repeat the process: 669 / 258

On to step 7:
The number 258 fits into 669 2 times, leaving a remainder of 153.
Write down 2 as next digit of the result. 
Result so far: 33482.0
The remainder is 153 after subtracting 516 from 669.
Include the next digit (3) from the dividend after 153, then repeat: 1533 / 258

Advancing to step 8:
When dividing 1533 by 258, we get 5 with a remainder of 243.
Use 5 as the next digit of our solution. 
Result so far: 334825.0
If we subtract 1290 from 1533, we get 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2430, and continue the process.

Let's proceed to step 9:
2430 divided by 258 is 9 with a remainder of 108.
Use 9 as the next digit of our solution. 
Result so far: 334825.9
Deduct 2322 from 2430 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 10:
If we divide 1080 by 258, we get 4 and a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 334825.94
Subtracting 1032 from 1080 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 11:
258 can be fit into 480 1 times, resulting in a remainder of 222.
The number 1 becomes the next digit in our result. 
Result so far: 334825.941
If we take 258 away from 480, we end up with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Advancing to step 12:
The number 258 fits into 2220 8 times, leaving a remainder of 156.
The next digit of our result is 8. 
Result so far: 334825.9418
If we take 2064 away from 2220, we end up with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

On to step 13:
258 can be fit into 1560 6 times, resulting in a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 334825.94186
If we subtract 1548 from 1560, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
258 can be fit into 120 0 times, resulting in a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 334825.94186
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 15:
When dividing 1200 by 258, we get 4 with a remainder of 168.
The next digit of our result is 4. 
Result so far: 334825.9418604
If we take 1032 away from 1200, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

On to step 16:
The number 258 fits into 1680 6 times, leaving a remainder of 132.
The next digit of our result is 6. 
Result so far: 334825.94186046
If we subtract 1548 from 1680, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Our division results in 334825.94186046 with a remaining 1.32e-07.