We're dividing 509404 by 77 
We want to figure out the number of times 509404 can be divided by 77.

Step 1:
77 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 77

Advancing to step 2:
If we divide 50 by 77, we get 0 and a remainder of 50.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 50 and we're left with 50.
Bring next digit (9) of the dividend behind the 50 and repeat the process: 509 / 77

On to step 3:
When dividing 509 by 77, we get 6 with a remainder of 47.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 47 after subtracting 462 from 509.
Append the next digit (4) from the dividend to 47 and continue with: 474 / 77

Moving on to step 4:
77 goes into 474 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 66.0
If we subtract 462 from 474, we get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 77

On to step 5:
If we divide 120 by 77, we get 1 and a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 661.0
Subtracting 77 from 120 leaves us with 43.
Include the next digit (4) from the dividend after 43, then repeat: 434 / 77

Step 6:
The number 77 fits into 434 5 times, leaving a remainder of 49.
Put 5 as the next digit of the answer. 
Result so far: 6615.0
Subtracting 385 from 434 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 7:
If we divide 490 by 77, we get 6 and a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 6615.6
If we subtract 462 from 490, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 8:
77 can be fit into 280 3 times, resulting in a remainder of 49.
The number 3 becomes the next digit in our result. 
Result so far: 6615.63
Subtracting 231 from 280 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 9:
If we divide 490 by 77, we get 6 and a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 6615.636
If we take 462 away from 490, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 10:
If we divide 280 by 77, we get 3 and a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 6615.6363
The remainder is 49 after subtracting 231 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 11:
77 goes into 490 6 times with a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 6615.63636
Subtract 462 from 490 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
77 can be fit into 280 3 times, resulting in a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 6615.636363
Subtract 231 from 280 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 13:
The number 77 fits into 490 6 times, leaving a remainder of 28.
Write down 6 as next digit of the result. 
Result so far: 6615.6363636
If we subtract 462 from 490, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 14:
The number 77 fits into 280 3 times, leaving a remainder of 49.
Write down 3 as next digit of the result. 
Result so far: 6615.63636363
The remainder is 49 after subtracting 231 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

After the division, we end up with 6615.63636363 and a remainder of 4.9e-08.