87737 divided by 77 
The aim is to understand the frequency of 77 in 87737.

Going ahead to step 1:
8 divided by 77 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 77

Advancing to step 2:
77 can be fit into 87 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 77 from 87 to get 10.
Grab the next digit (7) from the dividend, add it to 10, then carry on: 107 / 77

Moving on to step 3:
If we divide 107 by 77, we get 1 and a remainder of 30.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Deduct 77 from 107 and we're left with 30.
Append the next digit (3) from the dividend to 30 and continue with: 303 / 77

Advancing to step 4:
The number 77 fits into 303 3 times, leaving a remainder of 72.
The number 3 becomes the next digit in our result. 
Result so far: 113.0
If we take 231 away from 303, we end up with 72.
Bring next digit (7) of the dividend behind the 72 and repeat the process: 727 / 77

On to step 5:
When dividing 727 by 77, we get 9 with a remainder of 34.
The number 9 becomes the next digit in our result. 
Result so far: 1139.0
If we take 693 away from 727, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 6:
The number 77 fits into 340 4 times, leaving a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 1139.4
If we subtract 308 from 340, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 7:
320 divided by 77 is 4 with a remainder of 12.
The next digit of our result is 4. 
Result so far: 1139.44
If we subtract 308 from 320, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 1139.44 with a remainder of 0.012.