64445160 ÷ 660 
We want to divide 64445160 by 660.

On to step 1:
660 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
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 / 660

Advancing to step 2:
If we divide 64 by 660, we get 0 and a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Append the next digit (4) from the dividend to 64 and continue with: 644 / 660

Step 3:
644 divided by 660 is 0 with a remainder of 644.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 644 and we're left with 644.
Append the next digit (4) from the dividend to 644 and continue with: 6444 / 660

Advancing to step 4:
660 goes into 6444 9 times with a remainder of 504.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 504 after subtracting 5940 from 6444.
Take the next digit (5) from the dividend and append it to 504, then repeat: 5045 / 660

Moving on to step 5:
If we divide 5045 by 660, we get 7 and a remainder of 425.
Record the quotient 7 as the next digit in the result. 
Result so far: 97.0
If we take 4620 away from 5045, we end up with 425.
Grab the next digit (1) from the dividend, add it to 425, then carry on: 4251 / 660

On to step 6:
The number 660 fits into 4251 6 times, leaving a remainder of 291.
Record the quotient 6 as the next digit in the result. 
Result so far: 976.0
If we take 3960 away from 4251, we end up with 291.
Append the next digit (6) from the dividend to 291 and continue with: 2916 / 660

Step 7:
When dividing 2916 by 660, we get 4 with a remainder of 276.
The next digit of our result is 4. 
Result so far: 9764.0
If we take 2640 away from 2916, we end up with 276.
Fetch the next digit (0) from the dividend, attach it to 276 and continue: 2760 / 660

Let's proceed to step 8:
When dividing 2760 by 660, we get 4 with a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 97644.0
Subtract 2640 from 2760 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 9:
If we divide 1200 by 660, we get 1 and a remainder of 540.
The number 1 becomes the next digit in our result. 
Result so far: 97644.1
Subtract 660 from 1200 to get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

On to step 10:
The number 660 fits into 5400 8 times, leaving a remainder of 120.
The next digit of our result is 8. 
Result so far: 97644.18
The remainder is 120 after subtracting 5280 from 5400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 11:
1200 divided by 660 is 1 with a remainder of 540.
Write down 1 as next digit of the result. 
Result so far: 97644.181
If we subtract 660 from 1200, we get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Advancing to step 12:
When dividing 5400 by 660, we get 8 with a remainder of 120.
Put 8 as the next digit of the answer. 
Result so far: 97644.1818
If we take 5280 away from 5400, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 13:
660 can be fit into 1200 1 times, resulting in a remainder of 540.
Use 1 as the next digit of our solution. 
Result so far: 97644.18181
Subtracting 660 from 1200 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Let's proceed to step 14:
If we divide 5400 by 660, we get 8 and a remainder of 120.
Put 8 as the next digit of the answer. 
Result so far: 97644.181818
Subtract 5280 from 5400 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 15:
1200 divided by 660 is 1 with a remainder of 540.
Write down 1 as next digit of the result. 
Result so far: 97644.1818181
If we subtract 660 from 1200, we get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Let's proceed to step 16:
660 goes into 5400 8 times with a remainder of 120.
Write down 8 as next digit of the result. 
Result so far: 97644.18181818
Deduct 5280 from 5400 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final outcome is 97644.18181818, with a leftover of 1.2e-07.