We're dividing 684840 by 75 
We're looking to find how many times 75 goes into 684840.

Moving on to step 1:
When dividing 6 by 75, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 75

Advancing to step 2:
The number 75 fits into 68 0 times, leaving a remainder of 68.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 68, we end up with 68.
Grab the next digit (4) from the dividend, add it to 68, then carry on: 684 / 75

On to step 3:
684 divided by 75 is 9 with a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 675 from 684 to get 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 75

Advancing to step 4:
98 divided by 75 is 1 with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 91.0
If we take 75 away from 98, we end up with 23.
Grab the next digit (4) from the dividend, add it to 23, then carry on: 234 / 75

Going ahead to step 5:
The number 75 fits into 234 3 times, leaving a remainder of 9.
The next digit of our result is 3. 
Result so far: 913.0
Deduct 225 from 234 and we're left with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 75

Moving on to step 6:
75 can be fit into 90 1 times, resulting in a remainder of 15.
The next digit of our result is 1. 
Result so far: 9131.0
If we subtract 75 from 90, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
75 goes into 150 2 times with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 9131.2
If we take 150 away from 150, we end up 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.

Advancing to step 8:
The number 75 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9131.2
If we take 0 away from 0, we end up 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.

On to step 9:
75 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9131.2
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 9131.2 with a remainder of 0.0.