We're dividing 25347392 by 660 
The aim is to understand the frequency of 660 in 25347392.

Advancing to step 1:
660 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 660

Advancing to step 2:
660 goes into 25 0 times with a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Fetch the next digit (3) from the dividend, attach it to 25 and continue: 253 / 660

On to step 3:
The number 660 fits into 253 0 times, leaving a remainder of 253.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 253 to get 253.
Take the next digit (4) from the dividend and append it to 253, then repeat: 2534 / 660

Let's proceed to step 4:
2534 divided by 660 is 3 with a remainder of 554.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 1980 from 2534 and we're left with 554.
Bring next digit (7) of the dividend behind the 554 and repeat the process: 5547 / 660

Let's proceed to step 5:
The number 660 fits into 5547 8 times, leaving a remainder of 267.
The next digit of our result is 8. 
Result so far: 38.0
Subtracting 5280 from 5547 leaves us with 267.
Include the next digit (3) from the dividend after 267, then repeat: 2673 / 660

Step 6:
If we divide 2673 by 660, we get 4 and a remainder of 33.
Write down 4 as next digit of the result. 
Result so far: 384.0
Subtract 2640 from 2673 to get 33.
Include the next digit (9) from the dividend after 33, then repeat: 339 / 660

Going ahead to step 7:
When dividing 339 by 660, we get 0 with a remainder of 339.
The number 0 becomes the next digit in our result. 
Result so far: 3840.0
If we take 0 away from 339, we end up with 339.
Bring next digit (2) of the dividend behind the 339 and repeat the process: 3392 / 660

Going ahead to step 8:
If we divide 3392 by 660, we get 5 and a remainder of 92.
The number 5 becomes the next digit in our result. 
Result so far: 38405.0
If we take 3300 away from 3392, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 9:
If we divide 920 by 660, we get 1 and a remainder of 260.
The number 1 becomes the next digit in our result. 
Result so far: 38405.1
The remainder is 260 after subtracting 660 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

On to step 10:
If we divide 2600 by 660, we get 3 and a remainder of 620.
Write down 3 as next digit of the result. 
Result so far: 38405.13
Deduct 1980 from 2600 and we're left with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Advancing to step 11:
660 can be fit into 6200 9 times, resulting in a remainder of 260.
The number 9 becomes the next digit in our result. 
Result so far: 38405.139
Subtracting 5940 from 6200 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 12:
The number 660 fits into 2600 3 times, leaving a remainder of 620.
Use 3 as the next digit of our solution. 
Result so far: 38405.1393
Deduct 1980 from 2600 and we're left with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Moving on to step 13:
The number 660 fits into 6200 9 times, leaving a remainder of 260.
The number 9 becomes the next digit in our result. 
Result so far: 38405.13939
If we take 5940 away from 6200, we end up with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 14:
When dividing 2600 by 660, we get 3 with a remainder of 620.
Record the quotient 3 as the next digit in the result. 
Result so far: 38405.139393
Subtracting 1980 from 2600 leaves us with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Moving on to step 15:
The number 660 fits into 6200 9 times, leaving a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 38405.1393939
If we take 5940 away from 6200, we end up with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 16:
When dividing 2600 by 660, we get 3 with a remainder of 620.
The number 3 becomes the next digit in our result. 
Result so far: 38405.13939393
If we subtract 1980 from 2600, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

After the division, we end up with 38405.13939393 and a remainder of 6.2e-07.