393858 ÷ 75 
Let's see how many times 75 fits into 393858.

Moving on to step 1:
3 divided by 75 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 75

Going ahead to step 2:
39 divided by 75 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Grab the next digit (3) from the dividend, add it to 39, then carry on: 393 / 75

Let's proceed to step 3:
75 goes into 393 5 times with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 375 away from 393, we end up with 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 75

On to step 4:
75 can be fit into 188 2 times, resulting in a remainder of 38.
The next digit of our result is 2. 
Result so far: 52.0
If we subtract 150 from 188, we get 38.
Take the next digit (5) from the dividend and append it to 38, then repeat: 385 / 75

Going ahead to step 5:
When dividing 385 by 75, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 525.0
The remainder is 10 after subtracting 375 from 385.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 75

Let's proceed to step 6:
If we divide 108 by 75, we get 1 and a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 5251.0
If we take 75 away from 108, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 7:
330 divided by 75 is 4 with a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 5251.4
Deduct 300 from 330 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
75 can be fit into 300 4 times, resulting in a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 5251.44
Subtracting 300 from 300 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 5251.44 and a remainder of 0.0.