Let's divide 76978988 by 391
We want to figure out the number of times 76978988 can be divided by 391.

Advancing to step 1:
391 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 391

Let's proceed to step 2:
391 can be fit into 76 0 times, resulting in a remainder of 76.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Bring next digit (9) of the dividend behind the 76 and repeat the process: 769 / 391

Moving on to step 3:
The number 391 fits into 769 1 times, leaving a remainder of 378.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 391 from 769 leaves us with 378.
Include the next digit (7) from the dividend after 378, then repeat: 3787 / 391

Step 4:
3787 divided by 391 is 9 with a remainder of 268.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 3519 from 3787 to get 268.
Include the next digit (8) from the dividend after 268, then repeat: 2688 / 391

Going ahead to step 5:
If we divide 2688 by 391, we get 6 and a remainder of 342.
Write down 6 as next digit of the result. 
Result so far: 196.0
Deduct 2346 from 2688 and we're left with 342.
Fetch the next digit (9) from the dividend, attach it to 342 and continue: 3429 / 391

Advancing to step 6:
When dividing 3429 by 391, we get 8 with a remainder of 301.
Use 8 as the next digit of our solution. 
Result so far: 1968.0
The remainder is 301 after subtracting 3128 from 3429.
Grab the next digit (8) from the dividend, add it to 301, then carry on: 3018 / 391

Advancing to step 7:
391 can be fit into 3018 7 times, resulting in a remainder of 281.
Record the quotient 7 as the next digit in the result. 
Result so far: 19687.0
Subtract 2737 from 3018 to get 281.
Take the next digit (8) from the dividend and append it to 281, then repeat: 2818 / 391

Advancing to step 8:
391 goes into 2818 7 times with a remainder of 81.
The number 7 becomes the next digit in our result. 
Result so far: 196877.0
Deduct 2737 from 2818 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 9:
The number 391 fits into 810 2 times, leaving a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 196877.2
Subtracting 782 from 810 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 10:
391 can be fit into 280 0 times, resulting in a remainder of 280.
The next digit of our result is 0. 
Result so far: 196877.2
The remainder is 280 after subtracting 0 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 11:
391 can be fit into 2800 7 times, resulting in a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 196877.207
The remainder is 63 after subtracting 2737 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Let's proceed to step 12:
630 divided by 391 is 1 with a remainder of 239.
The next digit of our result is 1. 
Result so far: 196877.2071
Deduct 391 from 630 and we're left with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

On to step 13:
When dividing 2390 by 391, we get 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 196877.20716
Subtracting 2346 from 2390 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 14:
391 goes into 440 1 times with a remainder of 49.
Put 1 as the next digit of the answer. 
Result so far: 196877.207161
The remainder is 49 after subtracting 391 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 15:
The number 391 fits into 490 1 times, leaving a remainder of 99.
The number 1 becomes the next digit in our result. 
Result so far: 196877.2071611
Deduct 391 from 490 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

After the division, we end up with 196877.2071611 and a remainder of 9.9e-07.