We divide 640989 by 64
We want to divide 640989 by 64.

Step 1:
6 divided by 64 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 64

Step 2:
The number 64 fits into 64 1 times, leaving a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 64 from 64 and we're left with 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 64

Step 3:
64 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 0 and we're left with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 64

Step 4:
When dividing 9 by 64, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 100.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 64

Going ahead to step 5:
64 can be fit into 98 1 times, resulting in a remainder of 34.
The next digit of our result is 1. 
Result so far: 1001.0
If we subtract 64 from 98, we get 34.
Fetch the next digit (9) from the dividend, attach it to 34 and continue: 349 / 64

On to step 6:
If we divide 349 by 64, we get 5 and a remainder of 29.
Record the quotient 5 as the next digit in the result. 
Result so far: 10015.0
If we take 320 away from 349, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 7:
64 can be fit into 290 4 times, resulting in a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 10015.4
Deduct 256 from 290 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 8:
340 divided by 64 is 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 10015.45
Subtracting 320 from 340 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
The number 64 fits into 200 3 times, leaving a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 10015.453
If we subtract 192 from 200, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 10:
64 can be fit into 80 1 times, resulting in a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 10015.4531
If we subtract 64 from 80, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
If we divide 160 by 64, we get 2 and a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 10015.45312
Deduct 128 from 160 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 12:
64 can be fit into 320 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 10015.453125
Subtract 320 from 320 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.

Advancing to step 13:
When dividing 0 by 64, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 10015.453125
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.

Going ahead to step 14:
0 divided by 64 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10015.453125
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.

In conclusion, the division gives 10015.453125 with a balance of 0.0.