661990 divided by 75 
Let's see how many times 75 fits into 661990.

Let's proceed to step 1:
If we divide 6 by 75, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 75

Let's proceed to step 2:
75 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Append the next digit (1) from the dividend to 66 and continue with: 661 / 75

Step 3:
The number 75 fits into 661 8 times, leaving a remainder of 61.
The next digit of our result is 8. 
Result so far: 8.0
The remainder is 61 after subtracting 600 from 661.
Bring next digit (9) of the dividend behind the 61 and repeat the process: 619 / 75

Advancing to step 4:
If we divide 619 by 75, we get 8 and a remainder of 19.
The next digit of our result is 8. 
Result so far: 88.0
Subtracting 600 from 619 leaves us with 19.
Append the next digit (9) from the dividend to 19 and continue with: 199 / 75

Step 5:
When dividing 199 by 75, we get 2 with a remainder of 49.
Put 2 as the next digit of the answer. 
Result so far: 882.0
If we subtract 150 from 199, we get 49.
Append the next digit (0) from the dividend to 49 and continue with: 490 / 75

Going ahead to step 6:
75 goes into 490 6 times with a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 8826.0
If we subtract 450 from 490, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 7:
When dividing 400 by 75, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 8826.5
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.

On to step 8:
75 goes into 250 3 times with a remainder of 25.
Record the quotient 3 as the next digit in the result. 
Result so far: 8826.53
Deduct 225 from 250 and we're left 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.

Advancing to step 9:
250 divided by 75 is 3 with a remainder of 25.
Put 3 as the next digit of the answer. 
Result so far: 8826.533
The remainder is 25 after subtracting 225 from 250.
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 8826.533 and a remainder of 0.0025.