We're dividing 77139053 by 978 
We're looking to find how many times 978 goes into 77139053.

On to step 1:
978 can be fit into 7 0 times, resulting in 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.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 978

On to step 2:
978 goes into 77 0 times with a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Append the next digit (1) from the dividend to 77 and continue with: 771 / 978

Advancing to step 3:
The number 978 fits into 771 0 times, leaving a remainder of 771.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 771, we end up with 771.
Append the next digit (3) from the dividend to 771 and continue with: 7713 / 978

Let's proceed to step 4:
978 can be fit into 7713 7 times, resulting in a remainder of 867.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we subtract 6846 from 7713, we get 867.
Take the next digit (9) from the dividend and append it to 867, then repeat: 8679 / 978

Going ahead to step 5:
978 goes into 8679 8 times with a remainder of 855.
Put 8 as the next digit of the answer. 
Result so far: 78.0
Subtract 7824 from 8679 to get 855.
Bring next digit (0) of the dividend behind the 855 and repeat the process: 8550 / 978

Advancing to step 6:
978 goes into 8550 8 times with a remainder of 726.
Record the quotient 8 as the next digit in the result. 
Result so far: 788.0
If we take 7824 away from 8550, we end up with 726.
Include the next digit (5) from the dividend after 726, then repeat: 7265 / 978

Advancing to step 7:
978 can be fit into 7265 7 times, resulting in a remainder of 419.
The number 7 becomes the next digit in our result. 
Result so far: 7887.0
The remainder is 419 after subtracting 6846 from 7265.
Include the next digit (3) from the dividend after 419, then repeat: 4193 / 978

Moving on to step 8:
978 goes into 4193 4 times with a remainder of 281.
Write down 4 as next digit of the result. 
Result so far: 78874.0
Subtracting 3912 from 4193 leaves us with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

Advancing to step 9:
2810 divided by 978 is 2 with a remainder of 854.
Put 2 as the next digit of the answer. 
Result so far: 78874.2
Deduct 1956 from 2810 and we're left with 854.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8540, and continue the process.

Advancing to step 10:
The number 978 fits into 8540 8 times, leaving a remainder of 716.
The number 8 becomes the next digit in our result. 
Result so far: 78874.28
The remainder is 716 after subtracting 7824 from 8540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7160, and continue the process.

On to step 11:
7160 divided by 978 is 7 with a remainder of 314.
Use 7 as the next digit of our solution. 
Result so far: 78874.287
If we subtract 6846 from 7160, we get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Moving on to step 12:
3140 divided by 978 is 3 with a remainder of 206.
Record the quotient 3 as the next digit in the result. 
Result so far: 78874.2873
If we subtract 2934 from 3140, we get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Advancing to step 13:
When dividing 2060 by 978, we get 2 with a remainder of 104.
Use 2 as the next digit of our solution. 
Result so far: 78874.28732
If we take 1956 away from 2060, we end up with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 14:
978 goes into 1040 1 times with a remainder of 62.
Write down 1 as next digit of the result. 
Result so far: 78874.287321
The remainder is 62 after subtracting 978 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 15:
When dividing 620 by 978, we get 0 with a remainder of 620.
The number 0 becomes the next digit in our result. 
Result so far: 78874.287321
The remainder is 620 after subtracting 0 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Going ahead to step 16:
978 can be fit into 6200 6 times, resulting in a remainder of 332.
Put 6 as the next digit of the answer. 
Result so far: 78874.28732106
If we subtract 5868 from 6200, we get 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

The final outcome is 78874.28732106, with a leftover of 3.32e-07.