Let's divide 66403635 by 403
The aim is to understand the frequency of 403 in 66403635.

Moving on to step 1:
403 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 403

Let's proceed to step 2:
403 can be fit into 66 0 times, resulting in a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (4) from the dividend and append it to 66, then repeat: 664 / 403

On to step 3:
403 goes into 664 1 times with a remainder of 261.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 403 away from 664, we end up with 261.
Take the next digit (0) from the dividend and append it to 261, then repeat: 2610 / 403

Let's proceed to step 4:
When dividing 2610 by 403, we get 6 with a remainder of 192.
The number 6 becomes the next digit in our result. 
Result so far: 16.0
If we take 2418 away from 2610, we end up with 192.
Append the next digit (3) from the dividend to 192 and continue with: 1923 / 403

Step 5:
1923 divided by 403 is 4 with a remainder of 311.
The number 4 becomes the next digit in our result. 
Result so far: 164.0
If we take 1612 away from 1923, we end up with 311.
Bring next digit (6) of the dividend behind the 311 and repeat the process: 3116 / 403

Advancing to step 6:
403 goes into 3116 7 times with a remainder of 295.
The next digit of our result is 7. 
Result so far: 1647.0
Subtracting 2821 from 3116 leaves us with 295.
Take the next digit (3) from the dividend and append it to 295, then repeat: 2953 / 403

Step 7:
403 can be fit into 2953 7 times, resulting in a remainder of 132.
Record the quotient 7 as the next digit in the result. 
Result so far: 16477.0
If we subtract 2821 from 2953, we get 132.
Append the next digit (5) from the dividend to 132 and continue with: 1325 / 403

Step 8:
403 goes into 1325 3 times with a remainder of 116.
Write down 3 as next digit of the result. 
Result so far: 164773.0
The remainder is 116 after subtracting 1209 from 1325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Advancing to step 9:
403 can be fit into 1160 2 times, resulting in a remainder of 354.
Put 2 as the next digit of the answer. 
Result so far: 164773.2
If we take 806 away from 1160, we end up with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Let's proceed to step 10:
403 can be fit into 3540 8 times, resulting in a remainder of 316.
The number 8 becomes the next digit in our result. 
Result so far: 164773.28
Deduct 3224 from 3540 and we're left with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Going ahead to step 11:
The number 403 fits into 3160 7 times, leaving a remainder of 339.
Record the quotient 7 as the next digit in the result. 
Result so far: 164773.287
Subtract 2821 from 3160 to get 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

Moving on to step 12:
403 can be fit into 3390 8 times, resulting in a remainder of 166.
Use 8 as the next digit of our solution. 
Result so far: 164773.2878
Deduct 3224 from 3390 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Step 13:
If we divide 1660 by 403, we get 4 and a remainder of 48.
The number 4 becomes the next digit in our result. 
Result so far: 164773.28784
Subtract 1612 from 1660 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 14:
403 can be fit into 480 1 times, resulting in a remainder of 77.
Record the quotient 1 as the next digit in the result. 
Result so far: 164773.287841
If we take 403 away from 480, we end up with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 15:
When dividing 770 by 403, we get 1 with a remainder of 367.
Use 1 as the next digit of our solution. 
Result so far: 164773.2878411
Deduct 403 from 770 and we're left with 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

After the division, we end up with 164773.2878411 and a remainder of 3.67e-06.