21237514 divided by 77 
The aim is to understand the frequency of 77 in 21237514.

Advancing to step 1:
When dividing 2 by 77, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 77

On to step 2:
The number 77 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 77

On to step 3:
77 can be fit into 212 2 times, resulting in a remainder of 58.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 154 from 212, we get 58.
Fetch the next digit (3) from the dividend, attach it to 58 and continue: 583 / 77

Let's proceed to step 4:
77 goes into 583 7 times with a remainder of 44.
Write down 7 as next digit of the result. 
Result so far: 27.0
If we subtract 539 from 583, we get 44.
Take the next digit (7) from the dividend and append it to 44, then repeat: 447 / 77

Moving on to step 5:
447 divided by 77 is 5 with a remainder of 62.
Put 5 as the next digit of the answer. 
Result so far: 275.0
Deduct 385 from 447 and we're left with 62.
Grab the next digit (5) from the dividend, add it to 62, then carry on: 625 / 77

Let's proceed to step 6:
If we divide 625 by 77, we get 8 and a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 2758.0
If we subtract 616 from 625, we get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 77

Moving on to step 7:
The number 77 fits into 91 1 times, leaving a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 27581.0
Subtracting 77 from 91 leaves us with 14.
Include the next digit (4) from the dividend after 14, then repeat: 144 / 77

Going ahead to step 8:
77 can be fit into 144 1 times, resulting in a remainder of 67.
Record the quotient 1 as the next digit in the result. 
Result so far: 275811.0
If we take 77 away from 144, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 9:
670 divided by 77 is 8 with a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 275811.8
If we subtract 616 from 670, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
540 divided by 77 is 7 with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 275811.87
If we subtract 539 from 540, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
10 divided by 77 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 275811.87
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 12:
77 goes into 100 1 times with a remainder of 23.
Write down 1 as next digit of the result. 
Result so far: 275811.8701
If we take 77 away from 100, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 13:
230 divided by 77 is 2 with a remainder of 76.
Put 2 as the next digit of the answer. 
Result so far: 275811.87012
Subtracting 154 from 230 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 14:
77 can be fit into 760 9 times, resulting in a remainder of 67.
Use 9 as the next digit of our solution. 
Result so far: 275811.870129
Subtracting 693 from 760 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Moving on to step 15:
When dividing 670 by 77, we get 8 with a remainder of 54.
The number 8 becomes the next digit in our result. 
Result so far: 275811.8701298
If we take 616 away from 670, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 16:
540 divided by 77 is 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 275811.87012987
Subtract 539 from 540 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 275811.87012987 with a remainder of 1e-09.