Let's divide 35428793 by 660
The aim is to understand the frequency of 660 in 35428793.

On to step 1:
3 divided by 660 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 660

Going ahead to step 2:
35 divided by 660 is 0 with a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Fetch the next digit (4) from the dividend, attach it to 35 and continue: 354 / 660

Moving on to step 3:
The number 660 fits into 354 0 times, leaving a remainder of 354.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 354 and we're left with 354.
Fetch the next digit (2) from the dividend, attach it to 354 and continue: 3542 / 660

On to step 4:
660 goes into 3542 5 times with a remainder of 242.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 3300 from 3542, we get 242.
Take the next digit (8) from the dividend and append it to 242, then repeat: 2428 / 660

Step 5:
2428 divided by 660 is 3 with a remainder of 448.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
Deduct 1980 from 2428 and we're left with 448.
Grab the next digit (7) from the dividend, add it to 448, then carry on: 4487 / 660

On to step 6:
When dividing 4487 by 660, we get 6 with a remainder of 527.
Write down 6 as next digit of the result. 
Result so far: 536.0
Subtracting 3960 from 4487 leaves us with 527.
Bring next digit (9) of the dividend behind the 527 and repeat the process: 5279 / 660

Step 7:
If we divide 5279 by 660, we get 7 and a remainder of 659.
Write down 7 as next digit of the result. 
Result so far: 5367.0
The remainder is 659 after subtracting 4620 from 5279.
Take the next digit (3) from the dividend and append it to 659, then repeat: 6593 / 660

Moving on to step 8:
660 goes into 6593 9 times with a remainder of 653.
The next digit of our result is 9. 
Result so far: 53679.0
The remainder is 653 after subtracting 5940 from 6593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

On to step 9:
If we divide 6530 by 660, we get 9 and a remainder of 590.
Use 9 as the next digit of our solution. 
Result so far: 53679.9
Deduct 5940 from 6530 and we're left with 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Step 10:
When dividing 5900 by 660, we get 8 with a remainder of 620.
The number 8 becomes the next digit in our result. 
Result so far: 53679.98
If we subtract 5280 from 5900, 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.

Let's proceed to step 11:
6200 divided by 660 is 9 with a remainder of 260.
Write down 9 as next digit of the result. 
Result so far: 53679.989
The remainder is 260 after subtracting 5940 from 6200.
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 12:
The number 660 fits into 2600 3 times, leaving a remainder of 620.
Write down 3 as next digit of the result. 
Result so far: 53679.9893
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.

On to step 13:
660 can be fit into 6200 9 times, resulting in a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 53679.98939
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.
Put 3 as the next digit of the answer. 
Result so far: 53679.989393
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.

Let's proceed to step 15:
If we divide 6200 by 660, we get 9 and a remainder of 260.
Put 9 as the next digit of the answer. 
Result so far: 53679.9893939
Subtract 5940 from 6200 to get 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: 53679.98939393
The remainder is 620 after subtracting 1980 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

The final result is 53679.98939393 with a remainder of 6.2e-07.