We look at the division of 12805617 by 258 
We're looking to find how many times 258 goes into 12805617.

Step 1:
258 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 258

On to step 2:
When dividing 12 by 258, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Bring next digit (8) of the dividend behind the 12 and repeat the process: 128 / 258

Step 3:
When dividing 128 by 258, we get 0 with a remainder of 128.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 128, we end up with 128.
Grab the next digit (0) from the dividend, add it to 128, then carry on: 1280 / 258

Going ahead to step 4:
When dividing 1280 by 258, we get 4 with a remainder of 248.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 248 after subtracting 1032 from 1280.
Grab the next digit (5) from the dividend, add it to 248, then carry on: 2485 / 258

Step 5:
The number 258 fits into 2485 9 times, leaving a remainder of 163.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Subtracting 2322 from 2485 leaves us with 163.
Fetch the next digit (6) from the dividend, attach it to 163 and continue: 1636 / 258

Going ahead to step 6:
258 goes into 1636 6 times with a remainder of 88.
Write down 6 as next digit of the result. 
Result so far: 496.0
If we take 1548 away from 1636, we end up with 88.
Fetch the next digit (1) from the dividend, attach it to 88 and continue: 881 / 258

Going ahead to step 7:
When dividing 881 by 258, we get 3 with a remainder of 107.
Record the quotient 3 as the next digit in the result. 
Result so far: 4963.0
Subtract 774 from 881 to get 107.
Grab the next digit (7) from the dividend, add it to 107, then carry on: 1077 / 258

Going ahead to step 8:
258 goes into 1077 4 times with a remainder of 45.
Put 4 as the next digit of the answer. 
Result so far: 49634.0
If we subtract 1032 from 1077, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 9:
258 goes into 450 1 times with a remainder of 192.
Use 1 as the next digit of our solution. 
Result so far: 49634.1
Subtract 258 from 450 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 10:
258 can be fit into 1920 7 times, resulting in a remainder of 114.
Put 7 as the next digit of the answer. 
Result so far: 49634.17
Subtracting 1806 from 1920 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Advancing to step 11:
When dividing 1140 by 258, we get 4 with a remainder of 108.
Record the quotient 4 as the next digit in the result. 
Result so far: 49634.174
Subtract 1032 from 1140 to get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 12:
When dividing 1080 by 258, we get 4 with a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 49634.1744
If we subtract 1032 from 1080, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final result is 49634.1744 with a remainder of 0.00048.