77874175 ÷ 391 
We're looking to find how many times 391 goes into 77874175.

Let's proceed to step 1:
7 divided by 391 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 391

Advancing to step 2:
The number 391 fits into 77 0 times, leaving a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 77, we end up with 77.
Grab the next digit (8) from the dividend, add it to 77, then carry on: 778 / 391

Advancing to step 3:
The number 391 fits into 778 1 times, leaving a remainder of 387.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 391 from 778 leaves us with 387.
Bring next digit (7) of the dividend behind the 387 and repeat the process: 3877 / 391

Going ahead to step 4:
391 goes into 3877 9 times with a remainder of 358.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we subtract 3519 from 3877, we get 358.
Bring next digit (4) of the dividend behind the 358 and repeat the process: 3584 / 391

Step 5:
The number 391 fits into 3584 9 times, leaving a remainder of 65.
Use 9 as the next digit of our solution. 
Result so far: 199.0
Deduct 3519 from 3584 and we're left with 65.
Grab the next digit (1) from the dividend, add it to 65, then carry on: 651 / 391

Going ahead to step 6:
391 goes into 651 1 times with a remainder of 260.
Put 1 as the next digit of the answer. 
Result so far: 1991.0
If we take 391 away from 651, we end up with 260.
Include the next digit (7) from the dividend after 260, then repeat: 2607 / 391

Advancing to step 7:
The number 391 fits into 2607 6 times, leaving a remainder of 261.
The next digit of our result is 6. 
Result so far: 19916.0
If we take 2346 away from 2607, we end up with 261.
Grab the next digit (5) from the dividend, add it to 261, then carry on: 2615 / 391

Step 8:
When dividing 2615 by 391, we get 6 with a remainder of 269.
The next digit of our result is 6. 
Result so far: 199166.0
If we subtract 2346 from 2615, we get 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Moving on to step 9:
When dividing 2690 by 391, we get 6 with a remainder of 344.
Put 6 as the next digit of the answer. 
Result so far: 199166.6
If we subtract 2346 from 2690, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Advancing to step 10:
If we divide 3440 by 391, we get 8 and a remainder of 312.
Use 8 as the next digit of our solution. 
Result so far: 199166.68
Subtracting 3128 from 3440 leaves us with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Moving on to step 11:
When dividing 3120 by 391, we get 7 with a remainder of 383.
The number 7 becomes the next digit in our result. 
Result so far: 199166.687
Subtract 2737 from 3120 to get 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

Let's proceed to step 12:
If we divide 3830 by 391, we get 9 and a remainder of 311.
Write down 9 as next digit of the result. 
Result so far: 199166.6879
Subtracting 3519 from 3830 leaves us with 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Advancing to step 13:
If we divide 3110 by 391, we get 7 and a remainder of 373.
Record the quotient 7 as the next digit in the result. 
Result so far: 199166.68797
If we subtract 2737 from 3110, we get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Advancing to step 14:
When dividing 3730 by 391, we get 9 with a remainder of 211.
Write down 9 as next digit of the result. 
Result so far: 199166.687979
The remainder is 211 after subtracting 3519 from 3730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Let's proceed to step 15:
391 goes into 2110 5 times with a remainder of 155.
The number 5 becomes the next digit in our result. 
Result so far: 199166.6879795
The remainder is 155 after subtracting 1955 from 2110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 16:
When dividing 1550 by 391, we get 3 with a remainder of 377.
The next digit of our result is 3. 
Result so far: 199166.68797953
The remainder is 377 after subtracting 1173 from 1550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

The final outcome is 199166.68797953, with a leftover of 3.77e-07.