621555 divided by 75 
We want to figure out the number of times 621555 can be divided by 75.

Going ahead to step 1:
If we divide 6 by 75, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 75

On to step 2:
The number 75 fits into 62 0 times, leaving a remainder of 62.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 62 after subtracting 0 from 62.
Include the next digit (1) from the dividend after 62, then repeat: 621 / 75

On to step 3:
75 goes into 621 8 times with a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 600 away from 621, we end up with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 75

Moving on to step 4:
215 divided by 75 is 2 with a remainder of 65.
Put 2 as the next digit of the answer. 
Result so far: 82.0
Subtracting 150 from 215 leaves us with 65.
Append the next digit (5) from the dividend to 65 and continue with: 655 / 75

Advancing to step 5:
655 divided by 75 is 8 with a remainder of 55.
Write down 8 as next digit of the result. 
Result so far: 828.0
Subtract 600 from 655 to get 55.
Append the next digit (5) from the dividend to 55 and continue with: 555 / 75

Let's proceed to step 6:
75 can be fit into 555 7 times, resulting in a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 8287.0
The remainder is 30 after subtracting 525 from 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 7:
When dividing 300 by 75, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 8287.4
Deduct 300 from 300 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.

On to step 8:
75 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8287.4
Subtract 0 from 0 to 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.

On to step 9:
0 divided by 75 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8287.4
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.

Our division results in 8287.4 with a remaining 0.0.