Let's divide 780409 by 77
Our goal is to divide 780409 by 77.

Advancing to step 1:
If we divide 7 by 77, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 77

Going ahead to step 2:
If we divide 78 by 77, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 1 after subtracting 77 from 78.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 77

Going ahead to step 3:
The number 77 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 10, we get 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 77

Going ahead to step 4:
77 goes into 104 1 times with a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 101.0
The remainder is 27 after subtracting 77 from 104.
Fetch the next digit (0) from the dividend, attach it to 27 and continue: 270 / 77

Advancing to step 5:
If we divide 270 by 77, we get 3 and a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 1013.0
Subtract 231 from 270 to get 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 77

Moving on to step 6:
77 can be fit into 399 5 times, resulting in a remainder of 14.
Write down 5 as next digit of the result. 
Result so far: 10135.0
Deduct 385 from 399 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
The number 77 fits into 140 1 times, leaving a remainder of 63.
The next digit of our result is 1. 
Result so far: 10135.1
Deduct 77 from 140 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 8:
77 goes into 630 8 times with a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 10135.18
Subtracting 616 from 630 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
When dividing 140 by 77, we get 1 with a remainder of 63.
Record the quotient 1 as the next digit in the result. 
Result so far: 10135.181
If we take 77 away from 140, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 10:
If we divide 630 by 77, we get 8 and a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 10135.1818
Subtracting 616 from 630 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 11:
If we divide 140 by 77, we get 1 and a remainder of 63.
Write down 1 as next digit of the result. 
Result so far: 10135.18181
Deduct 77 from 140 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 12:
77 can be fit into 630 8 times, resulting in a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 10135.181818
If we take 616 away from 630, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 13:
77 goes into 140 1 times with a remainder of 63.
Write down 1 as next digit of the result. 
Result so far: 10135.1818181
If we subtract 77 from 140, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 14:
The number 77 fits into 630 8 times, leaving a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 10135.18181818
The remainder is 14 after subtracting 616 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 10135.18181818 with a remainder of 1.4e-08.