We look at the division of 258174 by 85 
We want to figure out the number of times 258174 can be divided by 85.

Step 1:
85 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 85

Moving on to step 2:
If we divide 25 by 85, we get 0 and a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Bring next digit (8) of the dividend behind the 25 and repeat the process: 258 / 85

Step 3:
The number 85 fits into 258 3 times, leaving a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 255 away from 258, we end up with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 85

Advancing to step 4:
The number 85 fits into 31 0 times, leaving a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 30.0
The remainder is 31 after subtracting 0 from 31.
Include the next digit (7) from the dividend after 31, then repeat: 317 / 85

Advancing to step 5:
If we divide 317 by 85, we get 3 and a remainder of 62.
The next digit of our result is 3. 
Result so far: 303.0
If we take 255 away from 317, we end up with 62.
Fetch the next digit (4) from the dividend, attach it to 62 and continue: 624 / 85

Step 6:
The number 85 fits into 624 7 times, leaving a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 3037.0
If we take 595 away from 624, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 7:
The number 85 fits into 290 3 times, leaving a remainder of 35.
The number 3 becomes the next digit in our result. 
Result so far: 3037.3
If we subtract 255 from 290, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
When dividing 350 by 85, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 3037.34
Subtracting 340 from 350 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
If we divide 100 by 85, we get 1 and a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 3037.341
If we take 85 away from 100, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 10:
85 goes into 150 1 times with a remainder of 65.
Write down 1 as next digit of the result. 
Result so far: 3037.3411
If we subtract 85 from 150, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The quotient of the division is 3037.3411, and the remainder is 0.00065.