64780278 ÷ 991 
We want to figure out the number of times 64780278 can be divided by 991.

Moving on to step 1:
If we divide 6 by 991, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 991

Moving on to step 2:
When dividing 64 by 991, we get 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Take the next digit (7) from the dividend and append it to 64, then repeat: 647 / 991

Advancing to step 3:
647 divided by 991 is 0 with a remainder of 647.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 647, we end up with 647.
Include the next digit (8) from the dividend after 647, then repeat: 6478 / 991

Moving on to step 4:
When dividing 6478 by 991, we get 6 with a remainder of 532.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 5946 from 6478 to get 532.
Grab the next digit (0) from the dividend, add it to 532, then carry on: 5320 / 991

On to step 5:
991 goes into 5320 5 times with a remainder of 365.
Write down 5 as next digit of the result. 
Result so far: 65.0
The remainder is 365 after subtracting 4955 from 5320.
Take the next digit (2) from the dividend and append it to 365, then repeat: 3652 / 991

On to step 6:
3652 divided by 991 is 3 with a remainder of 679.
Record the quotient 3 as the next digit in the result. 
Result so far: 653.0
Deduct 2973 from 3652 and we're left with 679.
Grab the next digit (7) from the dividend, add it to 679, then carry on: 6797 / 991

Let's proceed to step 7:
991 can be fit into 6797 6 times, resulting in a remainder of 851.
Put 6 as the next digit of the answer. 
Result so far: 6536.0
If we take 5946 away from 6797, we end up with 851.
Bring next digit (8) of the dividend behind the 851 and repeat the process: 8518 / 991

On to step 8:
991 goes into 8518 8 times with a remainder of 590.
Use 8 as the next digit of our solution. 
Result so far: 65368.0
If we subtract 7928 from 8518, we get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Step 9:
When dividing 5900 by 991, we get 5 with a remainder of 945.
The number 5 becomes the next digit in our result. 
Result so far: 65368.5
Subtract 4955 from 5900 to get 945.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9450, and continue the process.

Moving on to step 10:
991 can be fit into 9450 9 times, resulting in a remainder of 531.
Record the quotient 9 as the next digit in the result. 
Result so far: 65368.59
Subtracting 8919 from 9450 leaves us with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Let's proceed to step 11:
991 goes into 5310 5 times with a remainder of 355.
Put 5 as the next digit of the answer. 
Result so far: 65368.595
Subtracting 4955 from 5310 leaves us with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Going ahead to step 12:
3550 divided by 991 is 3 with a remainder of 577.
Put 3 as the next digit of the answer. 
Result so far: 65368.5953
If we subtract 2973 from 3550, we get 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Step 13:
The number 991 fits into 5770 5 times, leaving a remainder of 815.
Write down 5 as next digit of the result. 
Result so far: 65368.59535
Subtract 4955 from 5770 to get 815.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8150, and continue the process.

Going ahead to step 14:
If we divide 8150 by 991, we get 8 and a remainder of 222.
Put 8 as the next digit of the answer. 
Result so far: 65368.595358
Deduct 7928 from 8150 and we're left with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Step 15:
When dividing 2220 by 991, we get 2 with a remainder of 238.
Record the quotient 2 as the next digit in the result. 
Result so far: 65368.5953582
Subtract 1982 from 2220 to get 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Step 16:
991 can be fit into 2380 2 times, resulting in a remainder of 398.
Put 2 as the next digit of the answer. 
Result so far: 65368.59535822
Deduct 1982 from 2380 and we're left with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

In conclusion, the division gives 65368.59535822 with a balance of 3.98e-07.