64879520 ÷ 668 
We want to figure out the number of times 64879520 can be divided by 668.

Step 1:
The number 668 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 668

On to step 2:
64 divided by 668 is 0 with 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.
Fetch the next digit (8) from the dividend, attach it to 64 and continue: 648 / 668

Step 3:
The number 668 fits into 648 0 times, leaving a remainder of 648.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 648 to get 648.
Grab the next digit (7) from the dividend, add it to 648, then carry on: 6487 / 668

On to step 4:
The number 668 fits into 6487 9 times, leaving a remainder of 475.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
The remainder is 475 after subtracting 6012 from 6487.
Grab the next digit (9) from the dividend, add it to 475, then carry on: 4759 / 668

Going ahead to step 5:
When dividing 4759 by 668, we get 7 with a remainder of 83.
The number 7 becomes the next digit in our result. 
Result so far: 97.0
Deduct 4676 from 4759 and we're left with 83.
Fetch the next digit (5) from the dividend, attach it to 83 and continue: 835 / 668

Advancing to step 6:
668 goes into 835 1 times with a remainder of 167.
The number 1 becomes the next digit in our result. 
Result so far: 971.0
Subtracting 668 from 835 leaves us with 167.
Take the next digit (2) from the dividend and append it to 167, then repeat: 1672 / 668

Let's proceed to step 7:
If we divide 1672 by 668, we get 2 and a remainder of 336.
The next digit of our result is 2. 
Result so far: 9712.0
Deduct 1336 from 1672 and we're left with 336.
Include the next digit (0) from the dividend after 336, then repeat: 3360 / 668

Moving on to step 8:
The number 668 fits into 3360 5 times, leaving a remainder of 20.
The next digit of our result is 5. 
Result so far: 97125.0
Deduct 3340 from 3360 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
200 divided by 668 is 0 with a remainder of 200.
Put 0 as the next digit of the answer. 
Result so far: 97125.0
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
668 can be fit into 2000 2 times, resulting in a remainder of 664.
Use 2 as the next digit of our solution. 
Result so far: 97125.02
If we take 1336 away from 2000, we end up with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Step 11:
6640 divided by 668 is 9 with a remainder of 628.
Use 9 as the next digit of our solution. 
Result so far: 97125.029
Subtract 6012 from 6640 to get 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Step 12:
If we divide 6280 by 668, we get 9 and a remainder of 268.
Write down 9 as next digit of the result. 
Result so far: 97125.0299
If we subtract 6012 from 6280, we get 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

The final outcome is 97125.0299, with a leftover of 0.00268.