70764436 divided by 909 
The aim is to understand the frequency of 909 in 70764436.

On to step 1:
7 divided by 909 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 909

Moving on to step 2:
909 can be fit into 70 0 times, resulting in a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 70, we end up with 70.
Grab the next digit (7) from the dividend, add it to 70, then carry on: 707 / 909

Step 3:
When dividing 707 by 909, we get 0 with a remainder of 707.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 707, we end up with 707.
Grab the next digit (6) from the dividend, add it to 707, then carry on: 7076 / 909

Step 4:
909 goes into 7076 7 times with a remainder of 713.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 713 after subtracting 6363 from 7076.
Fetch the next digit (4) from the dividend, attach it to 713 and continue: 7134 / 909

On to step 5:
909 goes into 7134 7 times with a remainder of 771.
Put 7 as the next digit of the answer. 
Result so far: 77.0
Subtracting 6363 from 7134 leaves us with 771.
Grab the next digit (4) from the dividend, add it to 771, then carry on: 7714 / 909

Going ahead to step 6:
If we divide 7714 by 909, we get 8 and a remainder of 442.
Put 8 as the next digit of the answer. 
Result so far: 778.0
The remainder is 442 after subtracting 7272 from 7714.
Take the next digit (3) from the dividend and append it to 442, then repeat: 4423 / 909

Going ahead to step 7:
4423 divided by 909 is 4 with a remainder of 787.
Write down 4 as next digit of the result. 
Result so far: 7784.0
Subtracting 3636 from 4423 leaves us with 787.
Include the next digit (6) from the dividend after 787, then repeat: 7876 / 909

On to step 8:
909 can be fit into 7876 8 times, resulting in a remainder of 604.
Record the quotient 8 as the next digit in the result. 
Result so far: 77848.0
The remainder is 604 after subtracting 7272 from 7876.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Let's proceed to step 9:
909 goes into 6040 6 times with a remainder of 586.
Put 6 as the next digit of the answer. 
Result so far: 77848.6
Subtracting 5454 from 6040 leaves us with 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Advancing to step 10:
5860 divided by 909 is 6 with a remainder of 406.
Record the quotient 6 as the next digit in the result. 
Result so far: 77848.66
If we take 5454 away from 5860, we end up with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

The final outcome is 77848.66, with a leftover of 0.406.