645893 ÷ 64 
Our goal is to divide 645893 by 64.

Let's proceed to step 1:
When dividing 6 by 64, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 64

Let's proceed to step 2:
If we divide 64 by 64, we get 1 and 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.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 64

On to step 3:
5 divided by 64 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 5, we get 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 64

Advancing to step 4:
64 goes into 58 0 times with a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
Subtract 0 from 58 to get 58.
Take the next digit (9) from the dividend and append it to 58, then repeat: 589 / 64

Let's proceed to step 5:
The number 64 fits into 589 9 times, leaving a remainder of 13.
Write down 9 as next digit of the result. 
Result so far: 1009.0
Subtract 576 from 589 to get 13.
Include the next digit (3) from the dividend after 13, then repeat: 133 / 64

Step 6:
64 can be fit into 133 2 times, resulting in a remainder of 5.
Put 2 as the next digit of the answer. 
Result so far: 10092.0
If we subtract 128 from 133, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 7:
64 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 10092.0
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
When dividing 500 by 64, we get 7 with a remainder of 52.
Write down 7 as next digit of the result. 
Result so far: 10092.07
Deduct 448 from 500 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 9:
The number 64 fits into 520 8 times, leaving a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 10092.078
If we take 512 away from 520, we end up 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.

Moving on to step 10:
80 divided by 64 is 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 10092.0781
The remainder is 16 after subtracting 64 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 11:
64 can be fit into 160 2 times, resulting in a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 10092.07812
The remainder is 32 after subtracting 128 from 160.
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:
When dividing 320 by 64, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10092.078125
The remainder is 0 after subtracting 320 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10092.078125
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.

Let's proceed to step 14:
If we divide 0 by 64, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 10092.078125
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 final outcome is 10092.078125, with a leftover of 0.0.