We divide 66406978 by 665
We want to figure out the number of times 66406978 can be divided by 665.

Moving on to step 1:
The number 665 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 665

Going ahead to step 2:
The number 665 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Grab the next digit (4) from the dividend, add it to 66, then carry on: 664 / 665

Let's proceed to step 3:
664 divided by 665 is 0 with a remainder of 664.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 664, we get 664.
Fetch the next digit (0) from the dividend, attach it to 664 and continue: 6640 / 665

Step 4:
If we divide 6640 by 665, we get 9 and a remainder of 655.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 5985 from 6640 leaves us with 655.
Fetch the next digit (6) from the dividend, attach it to 655 and continue: 6556 / 665

Moving on to step 5:
The number 665 fits into 6556 9 times, leaving a remainder of 571.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Subtract 5985 from 6556 to get 571.
Append the next digit (9) from the dividend to 571 and continue with: 5719 / 665

Going ahead to step 6:
5719 divided by 665 is 8 with a remainder of 399.
Write down 8 as next digit of the result. 
Result so far: 998.0
If we take 5320 away from 5719, we end up with 399.
Bring next digit (7) of the dividend behind the 399 and repeat the process: 3997 / 665

Advancing to step 7:
3997 divided by 665 is 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 9986.0
If we subtract 3990 from 3997, we get 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 665

Let's proceed to step 8:
When dividing 78 by 665, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 99860.0
If we subtract 0 from 78, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 9:
When dividing 780 by 665, we get 1 with a remainder of 115.
The number 1 becomes the next digit in our result. 
Result so far: 99860.1
The remainder is 115 after subtracting 665 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Going ahead to step 10:
When dividing 1150 by 665, we get 1 with a remainder of 485.
The next digit of our result is 1. 
Result so far: 99860.11
Deduct 665 from 1150 and we're left with 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

The final result is 99860.11 with a remainder of 0.485.