64491716 divided by 20 
We want to figure out the number of times 64491716 can be divided by 20.

Moving on to step 1:
6 divided by 20 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 20

Step 2:
64 divided by 20 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 60 from 64, we get 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 20

Moving on to step 3:
20 goes into 44 2 times with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 32.0
If we take 40 away from 44, we end up with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 20

Moving on to step 4:
When dividing 49 by 20, we get 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 322.0
If we take 40 away from 49, we end up with 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 20

Let's proceed to step 5:
20 goes into 91 4 times with a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 3224.0
Subtracting 80 from 91 leaves us with 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 20

Advancing to step 6:
117 divided by 20 is 5 with a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 32245.0
Subtracting 100 from 117 leaves us with 17.
Include the next digit (1) from the dividend after 17, then repeat: 171 / 20

Advancing to step 7:
171 divided by 20 is 8 with a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 322458.0
If we take 160 away from 171, we end up with 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 20

Step 8:
20 can be fit into 116 5 times, resulting in a remainder of 16.
Record the quotient 5 as the next digit in the result. 
Result so far: 3224585.0
If we take 100 away from 116, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 9:
When dividing 160 by 20, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 3224585.8
If we take 160 away from 160, 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.

Advancing to step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 3224585.8
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.

Moving on to step 11:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3224585.8
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.

The quotient of the division is 3224585.8, and the remainder is 0.0.