643064 divided by 64 
Let's see how many times 64 fits into 643064.

Step 1:
If we divide 6 by 64, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 64

Advancing to step 2:
64 goes into 64 1 times with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 64 from 64 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 64

Let's proceed to step 3:
64 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 64

Going ahead to step 4:
64 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 100.0
If we subtract 0 from 30, we get 30.
Grab the next digit (6) from the dividend, add it to 30, then carry on: 306 / 64

Step 5:
The number 64 fits into 306 4 times, leaving a remainder of 50.
The number 4 becomes the next digit in our result. 
Result so far: 1004.0
Subtracting 256 from 306 leaves us with 50.
Include the next digit (4) from the dividend after 50, then repeat: 504 / 64

Advancing to step 6:
504 divided by 64 is 7 with a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 10047.0
Subtract 448 from 504 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Step 7:
560 divided by 64 is 8 with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 10047.8
Deduct 512 from 560 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 8:
64 goes into 480 7 times with a remainder of 32.
The next digit of our result is 7. 
Result so far: 10047.87
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.

Advancing to step 9:
When dividing 320 by 64, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 10047.875
If we subtract 320 from 320, we 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.

Step 10:
64 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10047.875
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.

Let's proceed to step 11:
0 divided by 64 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10047.875
If we subtract 0 from 0, we 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 result is 10047.875 with a remainder of 0.0.