We're dividing 643773 by 64 
We want to figure out the number of times 643773 can be divided by 64.

Going ahead to step 1:
The number 64 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 64

Step 2:
64 goes into 64 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 64 from 64 and we're left with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 64

Advancing to step 3:
The number 64 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 64

Advancing to step 4:
The number 64 fits into 37 0 times, leaving a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Subtracting 0 from 37 leaves us with 37.
Include the next digit (7) from the dividend after 37, then repeat: 377 / 64

Moving on to step 5:
If we divide 377 by 64, we get 5 and a remainder of 57.
The next digit of our result is 5. 
Result so far: 1005.0
The remainder is 57 after subtracting 320 from 377.
Append the next digit (3) from the dividend to 57 and continue with: 573 / 64

Let's proceed to step 6:
When dividing 573 by 64, we get 8 with a remainder of 61.
The next digit of our result is 8. 
Result so far: 10058.0
Deduct 512 from 573 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 7:
If we divide 610 by 64, we get 9 and a remainder of 34.
Record the quotient 9 as the next digit in the result. 
Result so far: 10058.9
Deduct 576 from 610 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.

Advancing to step 8:
The number 64 fits into 340 5 times, leaving a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 10058.95
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.

On to step 9:
64 goes into 200 3 times with a remainder of 8.
The next digit of our result is 3. 
Result so far: 10058.953
Deduct 192 from 200 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 10:
64 can be fit into 80 1 times, resulting in a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 10058.9531
Subtract 64 from 80 to 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.

Going ahead to step 11:
When dividing 160 by 64, we get 2 with a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 10058.95312
Subtract 128 from 160 to get 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 12:
64 can be fit into 320 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10058.953125
If we take 320 away from 320, 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.

Going ahead to step 13:
64 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10058.953125
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: 10058.953125
If we take 0 away from 0, 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.

In conclusion, the division gives 10058.953125 with a balance of 0.0.