Let's divide 63959 by 90
Let's see how many times 90 fits into 63959.

Step 1:
If we divide 6 by 90, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 90

Step 2:
The number 90 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Grab the next digit (9) from the dividend, add it to 63, then carry on: 639 / 90

Going ahead to step 3:
90 goes into 639 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 630 from 639 to get 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 90

Going ahead to step 4:
90 can be fit into 95 1 times, resulting in a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 71.0
Subtract 90 from 95 to get 5.
Include the next digit (9) from the dividend after 5, then repeat: 59 / 90

Let's proceed to step 5:
If we divide 59 by 90, we get 0 and a remainder of 59.
Record the quotient 0 as the next digit in the result. 
Result so far: 710.0
Subtracting 0 from 59 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 6:
590 divided by 90 is 6 with a remainder of 50.
Put 6 as the next digit of the answer. 
Result so far: 710.6
The remainder is 50 after subtracting 540 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
500 divided by 90 is 5 with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 710.65
Subtracting 450 from 500 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 8:
90 can be fit into 500 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 710.655
Subtracting 450 from 500 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 710.655, with a leftover of 0.005.