We look at the division of 915840 by 75 
We want to figure out the number of times 915840 can be divided by 75.

Step 1:
When dividing 9 by 75, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 75

Let's proceed to step 2:
75 can be fit into 91 1 times, resulting in a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 75 from 91, we get 16.
Include the next digit (5) from the dividend after 16, then repeat: 165 / 75

Advancing to step 3:
75 goes into 165 2 times with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 12.0
The remainder is 15 after subtracting 150 from 165.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 75

On to step 4:
75 can be fit into 158 2 times, resulting in a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 122.0
If we subtract 150 from 158, we get 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 75

Advancing to step 5:
If we divide 84 by 75, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1221.0
If we subtract 75 from 84, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 75

Advancing to step 6:
75 can be fit into 90 1 times, resulting in a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 12211.0
Deduct 75 from 90 and we're left 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.

On to step 7:
If we divide 150 by 75, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 12211.2
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:
0 divided by 75 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12211.2
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
75 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 12211.2
Deduct 0 from 0 and we're left 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 12211.2 and a remainder of 0.0.