We divide 63864521 by 660
We want to divide 63864521 by 660.

Step 1:
If we divide 6 by 660, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 660

On to step 2:
The number 660 fits into 63 0 times, leaving a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Include the next digit (8) from the dividend after 63, then repeat: 638 / 660

On to step 3:
660 goes into 638 0 times with a remainder of 638.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 638, we get 638.
Include the next digit (6) from the dividend after 638, then repeat: 6386 / 660

Let's proceed to step 4:
When dividing 6386 by 660, we get 9 with a remainder of 446.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 5940 from 6386 and we're left with 446.
Append the next digit (4) from the dividend to 446 and continue with: 4464 / 660

Going ahead to step 5:
The number 660 fits into 4464 6 times, leaving a remainder of 504.
The number 6 becomes the next digit in our result. 
Result so far: 96.0
Subtracting 3960 from 4464 leaves us with 504.
Take the next digit (5) from the dividend and append it to 504, then repeat: 5045 / 660

Advancing to step 6:
5045 divided by 660 is 7 with a remainder of 425.
Use 7 as the next digit of our solution. 
Result so far: 967.0
The remainder is 425 after subtracting 4620 from 5045.
Bring next digit (2) of the dividend behind the 425 and repeat the process: 4252 / 660

Moving on to step 7:
660 goes into 4252 6 times with a remainder of 292.
The next digit of our result is 6. 
Result so far: 9676.0
If we take 3960 away from 4252, we end up with 292.
Grab the next digit (1) from the dividend, add it to 292, then carry on: 2921 / 660

Step 8:
The number 660 fits into 2921 4 times, leaving a remainder of 281.
The number 4 becomes the next digit in our result. 
Result so far: 96764.0
Subtracting 2640 from 2921 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Moving on to step 9:
If we divide 2810 by 660, we get 4 and a remainder of 170.
The number 4 becomes the next digit in our result. 
Result so far: 96764.4
If we subtract 2640 from 2810, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 10:
660 goes into 1700 2 times with a remainder of 380.
The number 2 becomes the next digit in our result. 
Result so far: 96764.42
If we subtract 1320 from 1700, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Advancing to step 11:
When dividing 3800 by 660, we get 5 with a remainder of 500.
Put 5 as the next digit of the answer. 
Result so far: 96764.425
If we subtract 3300 from 3800, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Advancing to step 12:
The number 660 fits into 5000 7 times, leaving a remainder of 380.
Put 7 as the next digit of the answer. 
Result so far: 96764.4257
The remainder is 380 after subtracting 4620 from 5000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 13:
When dividing 3800 by 660, we get 5 with a remainder of 500.
Write down 5 as next digit of the result. 
Result so far: 96764.42575
If we subtract 3300 from 3800, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Let's proceed to step 14:
If we divide 5000 by 660, we get 7 and a remainder of 380.
Put 7 as the next digit of the answer. 
Result so far: 96764.425757
Deduct 4620 from 5000 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 15:
3800 divided by 660 is 5 with a remainder of 500.
The number 5 becomes the next digit in our result. 
Result so far: 96764.4257575
If we subtract 3300 from 3800, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 16:
660 goes into 5000 7 times with a remainder of 380.
Put 7 as the next digit of the answer. 
Result so far: 96764.42575757
If we subtract 4620 from 5000, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

The final result is 96764.42575757 with a remainder of 3.8e-07.