77857404 ÷ 239 
Our goal is to divide 77857404 by 239.

Step 1:
If we divide 7 by 239, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 239

Moving on to step 2:
When dividing 77 by 239, we get 0 with a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 77 after subtracting 0 from 77.
Bring next digit (8) of the dividend behind the 77 and repeat the process: 778 / 239

Going ahead to step 3:
If we divide 778 by 239, we get 3 and a remainder of 61.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 717 away from 778, we end up with 61.
Fetch the next digit (5) from the dividend, attach it to 61 and continue: 615 / 239

On to step 4:
If we divide 615 by 239, we get 2 and a remainder of 137.
Put 2 as the next digit of the answer. 
Result so far: 32.0
The remainder is 137 after subtracting 478 from 615.
Append the next digit (7) from the dividend to 137 and continue with: 1377 / 239

Let's proceed to step 5:
239 goes into 1377 5 times with a remainder of 182.
The next digit of our result is 5. 
Result so far: 325.0
Subtract 1195 from 1377 to get 182.
Take the next digit (4) from the dividend and append it to 182, then repeat: 1824 / 239

Going ahead to step 6:
If we divide 1824 by 239, we get 7 and a remainder of 151.
Record the quotient 7 as the next digit in the result. 
Result so far: 3257.0
Subtracting 1673 from 1824 leaves us with 151.
Bring next digit (0) of the dividend behind the 151 and repeat the process: 1510 / 239

Moving on to step 7:
When dividing 1510 by 239, we get 6 with a remainder of 76.
Use 6 as the next digit of our solution. 
Result so far: 32576.0
Subtract 1434 from 1510 to get 76.
Include the next digit (4) from the dividend after 76, then repeat: 764 / 239

Advancing to step 8:
764 divided by 239 is 3 with a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 325763.0
Subtract 717 from 764 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 9:
The number 239 fits into 470 1 times, leaving a remainder of 231.
The number 1 becomes the next digit in our result. 
Result so far: 325763.1
Subtract 239 from 470 to get 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Advancing to step 10:
The number 239 fits into 2310 9 times, leaving a remainder of 159.
Use 9 as the next digit of our solution. 
Result so far: 325763.19
Deduct 2151 from 2310 and we're left with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Going ahead to step 11:
The number 239 fits into 1590 6 times, leaving a remainder of 156.
The next digit of our result is 6. 
Result so far: 325763.196
Subtract 1434 from 1590 to get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 12:
239 can be fit into 1560 6 times, resulting in a remainder of 126.
Record the quotient 6 as the next digit in the result. 
Result so far: 325763.1966
Subtracting 1434 from 1560 leaves us with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

The final outcome is 325763.1966, with a leftover of 0.00126.