64508040 ÷ 81 
Let's see how many times 81 fits into 64508040.

Going ahead to step 1:
6 divided by 81 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 81

On to step 2:
81 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Fetch the next digit (5) from the dividend, attach it to 64 and continue: 645 / 81

Step 3:
The number 81 fits into 645 7 times, leaving a remainder of 78.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 78 after subtracting 567 from 645.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 81

Advancing to step 4:
81 goes into 780 9 times with a remainder of 51.
The next digit of our result is 9. 
Result so far: 79.0
If we subtract 729 from 780, we get 51.
Include the next digit (8) from the dividend after 51, then repeat: 518 / 81

Step 5:
518 divided by 81 is 6 with a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 796.0
If we subtract 486 from 518, we get 32.
Fetch the next digit (0) from the dividend, attach it to 32 and continue: 320 / 81

Going ahead to step 6:
81 goes into 320 3 times with a remainder of 77.
Put 3 as the next digit of the answer. 
Result so far: 7963.0
If we take 243 away from 320, we end up with 77.
Fetch the next digit (4) from the dividend, attach it to 77 and continue: 774 / 81

Advancing to step 7:
If we divide 774 by 81, we get 9 and a remainder of 45.
Record the quotient 9 as the next digit in the result. 
Result so far: 79639.0
The remainder is 45 after subtracting 729 from 774.
Include the next digit (0) from the dividend after 45, then repeat: 450 / 81

Let's proceed to step 8:
The number 81 fits into 450 5 times, leaving a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 796395.0
If we take 405 away from 450, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 9:
If we divide 450 by 81, we get 5 and a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 796395.5
Subtracting 405 from 450 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 10:
81 goes into 450 5 times with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 796395.55
If we take 405 away from 450, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 796395.55, with a leftover of 0.045.