Let's divide 639710 by 90
Let's see how many times 90 fits into 639710.

On to step 1:
6 divided by 90 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 90

Advancing to step 2:
63 divided by 90 is 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Take the next digit (9) from the dividend and append it to 63, then repeat: 639 / 90

Step 3:
90 can be fit into 639 7 times, resulting in a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 630 from 639 to get 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 90

Advancing to step 4:
90 can be fit into 97 1 times, resulting in a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 71.0
If we take 90 away from 97, we end up with 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 90

Step 5:
71 divided by 90 is 0 with a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 710.0
If we take 0 away from 71, we end up with 71.
Fetch the next digit (0) from the dividend, attach it to 71 and continue: 710 / 90

Advancing to step 6:
If we divide 710 by 90, we get 7 and a remainder of 80.
Write down 7 as next digit of the result. 
Result so far: 7107.0
If we take 630 away from 710, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 7:
The number 90 fits into 800 8 times, leaving a remainder of 80.
The next digit of our result is 8. 
Result so far: 7107.8
Subtract 720 from 800 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 8:
90 goes into 800 8 times with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 7107.88
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 7107.88 with a remaining 0.08.