We divide 645164 by 10
We want to figure out the number of times 645164 can be divided by 10.

Going ahead to step 1:
10 goes into 6 0 times 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.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 10

Going ahead to step 2:
10 can be fit into 64 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Deduct 60 from 64 and we're left with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 10

Step 3:
10 can be fit into 45 4 times, resulting in a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 64.0
Subtracting 40 from 45 leaves us with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 10

Going ahead to step 4:
10 goes into 51 5 times with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 645.0
If we take 50 away from 51, we end up with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 10

Going ahead to step 5:
16 divided by 10 is 1 with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 6451.0
Subtracting 10 from 16 leaves us with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 10

Let's proceed to step 6:
64 divided by 10 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 64516.0
The remainder is 4 after subtracting 60 from 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 7:
10 can be fit into 40 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 64516.4
Subtract 40 from 40 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.

Moving on to step 8:
The number 10 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 64516.4
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 9:
If we divide 0 by 10, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 64516.4
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 result is 64516.4 with a remainder of 0.0.