We look at the division of 87321931 by 75 
We want to figure out the number of times 87321931 can be divided by 75.

Let's proceed to step 1:
75 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 75

On to step 2:
If we divide 87 by 75, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 12 after subtracting 75 from 87.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 75

Let's proceed to step 3:
75 goes into 123 1 times with a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Deduct 75 from 123 and we're left with 48.
Fetch the next digit (2) from the dividend, attach it to 48 and continue: 482 / 75

Step 4:
If we divide 482 by 75, we get 6 and a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 116.0
Deduct 450 from 482 and we're left with 32.
Append the next digit (1) from the dividend to 32 and continue with: 321 / 75

Let's proceed to step 5:
75 goes into 321 4 times with a remainder of 21.
The next digit of our result is 4. 
Result so far: 1164.0
If we take 300 away from 321, we end up with 21.
Grab the next digit (9) from the dividend, add it to 21, then carry on: 219 / 75

Moving on to step 6:
75 can be fit into 219 2 times, resulting in a remainder of 69.
Write down 2 as next digit of the result. 
Result so far: 11642.0
Subtracting 150 from 219 leaves us with 69.
Bring next digit (3) of the dividend behind the 69 and repeat the process: 693 / 75

Let's proceed to step 7:
75 can be fit into 693 9 times, resulting in a remainder of 18.
The next digit of our result is 9. 
Result so far: 116429.0
The remainder is 18 after subtracting 675 from 693.
Grab the next digit (1) from the dividend, add it to 18, then carry on: 181 / 75

Let's proceed to step 8:
The number 75 fits into 181 2 times, leaving a remainder of 31.
The next digit of our result is 2. 
Result so far: 1164292.0
Subtract 150 from 181 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 9:
When dividing 310 by 75, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 1164292.4
If we subtract 300 from 310, we get 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 10:
75 can be fit into 100 1 times, resulting in a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 1164292.41
If we subtract 75 from 100, we 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.

Step 11:
The number 75 fits into 250 3 times, leaving a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 1164292.413
If we subtract 225 from 250, we 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.

Going ahead to step 12:
75 can be fit into 250 3 times, resulting in a remainder of 25.
Write down 3 as next digit of the result. 
Result so far: 1164292.4133
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.

The final outcome is 1164292.4133, with a leftover of 0.00025.