We're dividing 640971 by 64 
We want to divide 640971 by 64.

Advancing to step 1:
If we divide 6 by 64, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 64

Advancing to step 2:
When dividing 64 by 64, we get 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 64 from 64 to get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 64

Moving on to step 3:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 0, we get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 64

On to step 4:
9 divided by 64 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 64

Let's proceed to step 5:
64 can be fit into 97 1 times, resulting in a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 1001.0
Subtract 64 from 97 to get 33.
Take the next digit (1) from the dividend and append it to 33, then repeat: 331 / 64

Moving on to step 6:
The number 64 fits into 331 5 times, leaving a remainder of 11.
The next digit of our result is 5. 
Result so far: 10015.0
If we subtract 320 from 331, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
110 divided by 64 is 1 with a remainder of 46.
The number 1 becomes the next digit in our result. 
Result so far: 10015.1
Subtracting 64 from 110 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 8:
The number 64 fits into 460 7 times, leaving a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 10015.17
If we subtract 448 from 460, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
64 goes into 120 1 times with a remainder of 56.
The next digit of our result is 1. 
Result so far: 10015.171
If we take 64 away from 120, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 10:
If we divide 560 by 64, we get 8 and a remainder of 48.
Record the quotient 8 as the next digit in the result. 
Result so far: 10015.1718
The remainder is 48 after subtracting 512 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 11:
The number 64 fits into 480 7 times, leaving a remainder of 32.
Use 7 as the next digit of our solution. 
Result so far: 10015.17187
Deduct 448 from 480 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:
If we divide 320 by 64, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 10015.171875
Subtracting 320 from 320 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.

Moving on to step 13:
0 divided by 64 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 10015.171875
Subtract 0 from 0 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.

Going ahead to step 14:
When dividing 0 by 64, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10015.171875
Subtract 0 from 0 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.

The final outcome is 10015.171875, with a leftover of 0.0.