We're dividing 516639 by 75 
Let's see how many times 75 fits into 516639.

Step 1:
If we divide 5 by 75, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 75

Step 2:
If we divide 51 by 75, we get 0 and a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 75

Advancing to step 3:
The number 75 fits into 516 6 times, leaving a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 450 from 516 to get 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 75

Moving on to step 4:
The number 75 fits into 666 8 times, leaving a remainder of 66.
The number 8 becomes the next digit in our result. 
Result so far: 68.0
Subtracting 600 from 666 leaves us with 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 75

Moving on to step 5:
75 can be fit into 663 8 times, resulting in a remainder of 63.
The number 8 becomes the next digit in our result. 
Result so far: 688.0
The remainder is 63 after subtracting 600 from 663.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 75

Advancing to step 6:
639 divided by 75 is 8 with a remainder of 39.
The number 8 becomes the next digit in our result. 
Result so far: 6888.0
If we subtract 600 from 639, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 7:
When dividing 390 by 75, we get 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 6888.5
Subtract 375 from 390 to 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.

Going ahead to step 8:
If we divide 150 by 75, we get 2 and a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 6888.52
Deduct 150 from 150 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.

Step 9:
When dividing 0 by 75, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 6888.52
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.

Going ahead to step 10:
75 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 6888.52
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.

Our division results in 6888.52 with a remaining 0.0.