29908045 ÷ 645 
The aim is to understand the frequency of 645 in 29908045.

Advancing to step 1:
If we divide 2 by 645, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 645

Going ahead to step 2:
29 divided by 645 is 0 with a remainder of 29.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 29 and we're left with 29.
Grab the next digit (9) from the dividend, add it to 29, then carry on: 299 / 645

Advancing to step 3:
645 can be fit into 299 0 times, resulting in a remainder of 299.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 299, we end up with 299.
Include the next digit (0) from the dividend after 299, then repeat: 2990 / 645

Let's proceed to step 4:
645 goes into 2990 4 times with a remainder of 410.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 410 after subtracting 2580 from 2990.
Bring next digit (8) of the dividend behind the 410 and repeat the process: 4108 / 645

Moving on to step 5:
645 can be fit into 4108 6 times, resulting in a remainder of 238.
The number 6 becomes the next digit in our result. 
Result so far: 46.0
The remainder is 238 after subtracting 3870 from 4108.
Append the next digit (0) from the dividend to 238 and continue with: 2380 / 645

Advancing to step 6:
2380 divided by 645 is 3 with a remainder of 445.
Use 3 as the next digit of our solution. 
Result so far: 463.0
If we subtract 1935 from 2380, we get 445.
Fetch the next digit (4) from the dividend, attach it to 445 and continue: 4454 / 645

Let's proceed to step 7:
645 can be fit into 4454 6 times, resulting in a remainder of 584.
Record the quotient 6 as the next digit in the result. 
Result so far: 4636.0
If we subtract 3870 from 4454, we get 584.
Take the next digit (5) from the dividend and append it to 584, then repeat: 5845 / 645

Moving on to step 8:
If we divide 5845 by 645, we get 9 and a remainder of 40.
Write down 9 as next digit of the result. 
Result so far: 46369.0
The remainder is 40 after subtracting 5805 from 5845.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
400 divided by 645 is 0 with a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 46369.0
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 10:
If we divide 4000 by 645, we get 6 and a remainder of 130.
Write down 6 as next digit of the result. 
Result so far: 46369.06
Subtracting 3870 from 4000 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 11:
If we divide 1300 by 645, we get 2 and a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 46369.062
Subtract 1290 from 1300 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
If we divide 100 by 645, we get 0 and a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 46369.062
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 13:
The number 645 fits into 1000 1 times, leaving a remainder of 355.
The number 1 becomes the next digit in our result. 
Result so far: 46369.06201
The remainder is 355 after subtracting 645 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Moving on to step 14:
3550 divided by 645 is 5 with a remainder of 325.
Write down 5 as next digit of the result. 
Result so far: 46369.062015
Subtracting 3225 from 3550 leaves us with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Going ahead to step 15:
The number 645 fits into 3250 5 times, leaving a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 46369.0620155
Subtract 3225 from 3250 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

After the division, we end up with 46369.0620155 and a remainder of 2.5e-07.