We divide 683404 by 77
The aim is to understand the frequency of 77 in 683404.

On to step 1:
When dividing 6 by 77, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 77

Going ahead to step 2:
68 divided by 77 is 0 with a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 68 and we're left with 68.
Append the next digit (3) from the dividend to 68 and continue with: 683 / 77

Advancing to step 3:
77 can be fit into 683 8 times, resulting in a remainder of 67.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 616 from 683 to get 67.
Append the next digit (4) from the dividend to 67 and continue with: 674 / 77

Going ahead to step 4:
If we divide 674 by 77, we get 8 and a remainder of 58.
Use 8 as the next digit of our solution. 
Result so far: 88.0
The remainder is 58 after subtracting 616 from 674.
Fetch the next digit (0) from the dividend, attach it to 58 and continue: 580 / 77

Let's proceed to step 5:
580 divided by 77 is 7 with a remainder of 41.
The number 7 becomes the next digit in our result. 
Result so far: 887.0
Subtract 539 from 580 to get 41.
Bring next digit (4) of the dividend behind the 41 and repeat the process: 414 / 77

Step 6:
The number 77 fits into 414 5 times, leaving a remainder of 29.
The next digit of our result is 5. 
Result so far: 8875.0
Subtracting 385 from 414 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 7:
290 divided by 77 is 3 with a remainder of 59.
Put 3 as the next digit of the answer. 
Result so far: 8875.3
Deduct 231 from 290 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 8:
When dividing 590 by 77, we get 7 with a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 8875.37
Subtracting 539 from 590 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Step 9:
When dividing 510 by 77, we get 6 with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 8875.376
If we take 462 away from 510, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 10:
The number 77 fits into 480 6 times, leaving a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 8875.3766
The remainder is 18 after subtracting 462 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

The final outcome is 8875.3766, with a leftover of 0.00018.