64978728 divided by 523 
The aim is to understand the frequency of 523 in 64978728.

On to step 1:
523 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 523

Moving on to step 2:
When dividing 64 by 523, we get 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (9) from the dividend after 64, then repeat: 649 / 523

Let's proceed to step 3:
649 divided by 523 is 1 with a remainder of 126.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 126 after subtracting 523 from 649.
Grab the next digit (7) from the dividend, add it to 126, then carry on: 1267 / 523

On to step 4:
The number 523 fits into 1267 2 times, leaving a remainder of 221.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 1046 from 1267, we get 221.
Take the next digit (8) from the dividend and append it to 221, then repeat: 2218 / 523

Step 5:
When dividing 2218 by 523, we get 4 with a remainder of 126.
Use 4 as the next digit of our solution. 
Result so far: 124.0
If we take 2092 away from 2218, we end up with 126.
Fetch the next digit (7) from the dividend, attach it to 126 and continue: 1267 / 523

Going ahead to step 6:
When dividing 1267 by 523, we get 2 with a remainder of 221.
Record the quotient 2 as the next digit in the result. 
Result so far: 1242.0
Subtracting 1046 from 1267 leaves us with 221.
Bring next digit (2) of the dividend behind the 221 and repeat the process: 2212 / 523

Going ahead to step 7:
If we divide 2212 by 523, we get 4 and a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 12424.0
If we subtract 2092 from 2212, we get 120.
Grab the next digit (8) from the dividend, add it to 120, then carry on: 1208 / 523

Moving on to step 8:
523 can be fit into 1208 2 times, resulting in a remainder of 162.
Put 2 as the next digit of the answer. 
Result so far: 124242.0
The remainder is 162 after subtracting 1046 from 1208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 9:
523 can be fit into 1620 3 times, resulting in a remainder of 51.
Record the quotient 3 as the next digit in the result. 
Result so far: 124242.3
Deduct 1569 from 1620 and we're left 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.

On to step 10:
The number 523 fits into 510 0 times, leaving a remainder of 510.
The number 0 becomes the next digit in our result. 
Result so far: 124242.3
If we subtract 0 from 510, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Advancing to step 11:
The number 523 fits into 5100 9 times, leaving a remainder of 393.
The next digit of our result is 9. 
Result so far: 124242.309
Subtracting 4707 from 5100 leaves us with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Let's proceed to step 12:
3930 divided by 523 is 7 with a remainder of 269.
The next digit of our result is 7. 
Result so far: 124242.3097
Subtracting 3661 from 3930 leaves us with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Moving on to step 13:
When dividing 2690 by 523, we get 5 with a remainder of 75.
Record the quotient 5 as the next digit in the result. 
Result so far: 124242.30975
Deduct 2615 from 2690 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 14:
If we divide 750 by 523, we get 1 and a remainder of 227.
The next digit of our result is 1. 
Result so far: 124242.309751
Deduct 523 from 750 and we're left with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Moving on to step 15:
The number 523 fits into 2270 4 times, leaving a remainder of 178.
Write down 4 as next digit of the result. 
Result so far: 124242.3097514
Subtract 2092 from 2270 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Step 16:
523 can be fit into 1780 3 times, resulting in a remainder of 211.
The next digit of our result is 3. 
Result so far: 124242.30975143
If we take 1569 away from 1780, we end up with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Our division results in 124242.30975143 with a remaining 2.11e-07.