We look at the division of 843964 by 75 
We're looking to find how many times 75 goes into 843964.

Moving on to step 1:
If we divide 8 by 75, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 75

Let's proceed to step 2:
75 can be fit into 84 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 75 from 84, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 75

Advancing to step 3:
93 divided by 75 is 1 with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we subtract 75 from 93, we get 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 75

Step 4:
When dividing 189 by 75, we get 2 with a remainder of 39.
The next digit of our result is 2. 
Result so far: 112.0
Deduct 150 from 189 and we're left with 39.
Fetch the next digit (6) from the dividend, attach it to 39 and continue: 396 / 75

Step 5:
When dividing 396 by 75, we get 5 with a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 1125.0
If we take 375 away from 396, we end up with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 75

Let's proceed to step 6:
If we divide 214 by 75, we get 2 and a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 11252.0
Subtracting 150 from 214 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 7:
75 goes into 640 8 times with a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 11252.8
The remainder is 40 after subtracting 600 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 8:
400 divided by 75 is 5 with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 11252.85
If we take 375 away from 400, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 9:
The number 75 fits into 250 3 times, leaving a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 11252.853
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 10:
If we divide 250 by 75, we get 3 and a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 11252.8533
Subtract 225 from 250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 11252.8533 and a remainder of 0.00025.