We look at the division of 640962 by 90 
We want to divide 640962 by 90.

Step 1:
When dividing 6 by 90, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 90

Going ahead to step 2:
If we divide 64 by 90, we get 0 and a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (0) from the dividend, attach it to 64 and continue: 640 / 90

On to step 3:
If we divide 640 by 90, we get 7 and a remainder of 10.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 630 from 640 and we're left with 10.
Grab the next digit (9) from the dividend, add it to 10, then carry on: 109 / 90

Advancing to step 4:
The number 90 fits into 109 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 71.0
The remainder is 19 after subtracting 90 from 109.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 90

On to step 5:
90 can be fit into 196 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 712.0
The remainder is 16 after subtracting 180 from 196.
Take the next digit (2) from the dividend and append it to 16, then repeat: 162 / 90

Let's proceed to step 6:
The number 90 fits into 162 1 times, leaving a remainder of 72.
The next digit of our result is 1. 
Result so far: 7121.0
Deduct 90 from 162 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 7:
If we divide 720 by 90, we get 8 and a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 7121.8
If we take 720 away from 720, we end up 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.

Let's proceed to step 8:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7121.8
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
90 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7121.8
Subtracting 0 from 0 leaves us 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.

The quotient of the division is 7121.8, and the remainder is 0.0.