We're dividing 78105404 by 77 
We're looking to find how many times 77 goes into 78105404.

Advancing to step 1:
The number 77 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 77

Moving on to step 2:
When dividing 78 by 77, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 77 from 78 to get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 77

Let's proceed to step 3:
77 goes into 11 0 times with a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 11, we end up with 11.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 77

Moving on to step 4:
If we divide 110 by 77, we get 1 and a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 101.0
The remainder is 33 after subtracting 77 from 110.
Include the next digit (5) from the dividend after 33, then repeat: 335 / 77

On to step 5:
335 divided by 77 is 4 with a remainder of 27.
The next digit of our result is 4. 
Result so far: 1014.0
If we take 308 away from 335, we end up with 27.
Bring next digit (4) of the dividend behind the 27 and repeat the process: 274 / 77

Moving on to step 6:
77 can be fit into 274 3 times, resulting in a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 10143.0
Subtract 231 from 274 to get 43.
Grab the next digit (0) from the dividend, add it to 43, then carry on: 430 / 77

Let's proceed to step 7:
77 goes into 430 5 times with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 101435.0
If we subtract 385 from 430, we get 45.
Grab the next digit (4) from the dividend, add it to 45, then carry on: 454 / 77

Moving on to step 8:
If we divide 454 by 77, we get 5 and a remainder of 69.
Use 5 as the next digit of our solution. 
Result so far: 1014355.0
If we take 385 away from 454, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 9:
The number 77 fits into 690 8 times, leaving a remainder of 74.
Put 8 as the next digit of the answer. 
Result so far: 1014355.8
Deduct 616 from 690 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 10:
If we divide 740 by 77, we get 9 and a remainder of 47.
Use 9 as the next digit of our solution. 
Result so far: 1014355.89
Deduct 693 from 740 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 11:
The number 77 fits into 470 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 1014355.896
Subtract 462 from 470 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
77 can be fit into 80 1 times, resulting in a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1014355.8961
Subtract 77 from 80 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 13:
30 divided by 77 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 1014355.8961
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 14:
When dividing 300 by 77, we get 3 with a remainder of 69.
Put 3 as the next digit of the answer. 
Result so far: 1014355.896103
The remainder is 69 after subtracting 231 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 15:
690 divided by 77 is 8 with a remainder of 74.
Write down 8 as next digit of the result. 
Result so far: 1014355.8961038
Deduct 616 from 690 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 16:
740 divided by 77 is 9 with a remainder of 47.
Record the quotient 9 as the next digit in the result. 
Result so far: 1014355.89610389
Deduct 693 from 740 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The final result is 1014355.89610389 with a remainder of 4.7e-08.