We're dividing 645929 by 80 
We want to divide 645929 by 80.

Going ahead to step 1:
If we divide 6 by 80, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 80

Step 2:
The number 80 fits into 64 0 times, leaving a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 80

Moving on to step 3:
If we divide 645 by 80, we get 8 and a remainder of 5.
The next digit of our result is 8. 
Result so far: 8.0
If we subtract 640 from 645, we get 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 80

Step 4:
59 divided by 80 is 0 with a remainder of 59.
The next digit of our result is 0. 
Result so far: 80.0
The remainder is 59 after subtracting 0 from 59.
Fetch the next digit (2) from the dividend, attach it to 59 and continue: 592 / 80

Going ahead to step 5:
If we divide 592 by 80, we get 7 and a remainder of 32.
The number 7 becomes the next digit in our result. 
Result so far: 807.0
Subtracting 560 from 592 leaves us with 32.
Append the next digit (9) from the dividend to 32 and continue with: 329 / 80

Moving on to step 6:
The number 80 fits into 329 4 times, leaving a remainder of 9.
Write down 4 as next digit of the result. 
Result so far: 8074.0
Subtract 320 from 329 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
90 divided by 80 is 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 8074.1
Subtract 80 from 90 to 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.

Let's proceed to step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
The next digit of our result is 1. 
Result so far: 8074.11
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 8074.11, and the remainder is 0.02.