We're dividing 66355700 by 387 
The aim is to understand the frequency of 387 in 66355700.

Going ahead to step 1:
When dividing 6 by 387, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 387

On to step 2:
The number 387 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Take the next digit (3) from the dividend and append it to 66, then repeat: 663 / 387

On to step 3:
663 divided by 387 is 1 with a remainder of 276.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 387 from 663 leaves us with 276.
Bring next digit (5) of the dividend behind the 276 and repeat the process: 2765 / 387

Going ahead to step 4:
387 can be fit into 2765 7 times, resulting in a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 17.0
The remainder is 56 after subtracting 2709 from 2765.
Include the next digit (5) from the dividend after 56, then repeat: 565 / 387

Moving on to step 5:
387 goes into 565 1 times with a remainder of 178.
Put 1 as the next digit of the answer. 
Result so far: 171.0
Deduct 387 from 565 and we're left with 178.
Append the next digit (7) from the dividend to 178 and continue with: 1787 / 387

Let's proceed to step 6:
387 goes into 1787 4 times with a remainder of 239.
The number 4 becomes the next digit in our result. 
Result so far: 1714.0
Subtract 1548 from 1787 to get 239.
Append the next digit (0) from the dividend to 239 and continue with: 2390 / 387

Let's proceed to step 7:
2390 divided by 387 is 6 with a remainder of 68.
Write down 6 as next digit of the result. 
Result so far: 17146.0
Deduct 2322 from 2390 and we're left with 68.
Bring next digit (0) of the dividend behind the 68 and repeat the process: 680 / 387

Let's proceed to step 8:
The number 387 fits into 680 1 times, leaving a remainder of 293.
Record the quotient 1 as the next digit in the result. 
Result so far: 171461.0
Subtracting 387 from 680 leaves us with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Step 9:
387 can be fit into 2930 7 times, resulting in a remainder of 221.
The next digit of our result is 7. 
Result so far: 171461.7
The remainder is 221 after subtracting 2709 from 2930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Let's proceed to step 10:
2210 divided by 387 is 5 with a remainder of 275.
The next digit of our result is 5. 
Result so far: 171461.75
The remainder is 275 after subtracting 1935 from 2210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 11:
When dividing 2750 by 387, we get 7 with a remainder of 41.
Put 7 as the next digit of the answer. 
Result so far: 171461.757
The remainder is 41 after subtracting 2709 from 2750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 12:
410 divided by 387 is 1 with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 171461.7571
The remainder is 23 after subtracting 387 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 13:
230 divided by 387 is 0 with a remainder of 230.
The number 0 becomes the next digit in our result. 
Result so far: 171461.7571
If we subtract 0 from 230, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Going ahead to step 14:
If we divide 2300 by 387, we get 5 and a remainder of 365.
Record the quotient 5 as the next digit in the result. 
Result so far: 171461.757105
Subtracting 1935 from 2300 leaves us with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Let's proceed to step 15:
387 can be fit into 3650 9 times, resulting in a remainder of 167.
The next digit of our result is 9. 
Result so far: 171461.7571059
If we take 3483 away from 3650, we end up with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Moving on to step 16:
When dividing 1670 by 387, we get 4 with a remainder of 122.
The next digit of our result is 4. 
Result so far: 171461.75710594
If we subtract 1548 from 1670, we get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

After the division, we end up with 171461.75710594 and a remainder of 1.22e-07.