We divide 287858 by 77
The aim is to understand the frequency of 77 in 287858.

Going ahead to step 1:
If we divide 2 by 77, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 77

On to step 2:
77 goes into 28 0 times with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 28 to get 28.
Take the next digit (7) from the dividend and append it to 28, then repeat: 287 / 77

Advancing to step 3:
77 can be fit into 287 3 times, resulting in a remainder of 56.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 231 from 287 and we're left with 56.
Include the next digit (8) from the dividend after 56, then repeat: 568 / 77

Moving on to step 4:
When dividing 568 by 77, we get 7 with a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 37.0
The remainder is 29 after subtracting 539 from 568.
Bring next digit (5) of the dividend behind the 29 and repeat the process: 295 / 77

Step 5:
77 can be fit into 295 3 times, resulting in a remainder of 64.
The number 3 becomes the next digit in our result. 
Result so far: 373.0
Subtracting 231 from 295 leaves us with 64.
Grab the next digit (8) from the dividend, add it to 64, then carry on: 648 / 77

Moving on to step 6:
If we divide 648 by 77, we get 8 and a remainder of 32.
Record the quotient 8 as the next digit in the result. 
Result so far: 3738.0
Subtracting 616 from 648 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 7:
When dividing 320 by 77, we get 4 with a remainder of 12.
The next digit of our result is 4. 
Result so far: 3738.4
Subtracting 308 from 320 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
The number 77 fits into 120 1 times, leaving a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 3738.41
Subtracting 77 from 120 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 9:
430 divided by 77 is 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 3738.415
Deduct 385 from 430 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Going ahead to step 10:
450 divided by 77 is 5 with a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 3738.4155
Subtracting 385 from 450 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The quotient of the division is 3738.4155, and the remainder is 0.00065.