Let's divide 16186467 by 646
The aim is to understand the frequency of 646 in 16186467.

Step 1:
646 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 646

Moving on to step 2:
If we divide 16 by 646, we get 0 and a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 646

Advancing to step 3:
If we divide 161 by 646, we get 0 and a remainder of 161.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 161 after subtracting 0 from 161.
Take the next digit (8) from the dividend and append it to 161, then repeat: 1618 / 646

Let's proceed to step 4:
When dividing 1618 by 646, we get 2 with a remainder of 326.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 1292 from 1618 leaves us with 326.
Fetch the next digit (6) from the dividend, attach it to 326 and continue: 3266 / 646

On to step 5:
646 can be fit into 3266 5 times, resulting in a remainder of 36.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtract 3230 from 3266 to get 36.
Take the next digit (4) from the dividend and append it to 36, then repeat: 364 / 646

Let's proceed to step 6:
The number 646 fits into 364 0 times, leaving a remainder of 364.
Put 0 as the next digit of the answer. 
Result so far: 250.0
If we subtract 0 from 364, we get 364.
Bring next digit (6) of the dividend behind the 364 and repeat the process: 3646 / 646

Going ahead to step 7:
3646 divided by 646 is 5 with a remainder of 416.
Use 5 as the next digit of our solution. 
Result so far: 2505.0
If we take 3230 away from 3646, we end up with 416.
Fetch the next digit (7) from the dividend, attach it to 416 and continue: 4167 / 646

Advancing to step 8:
4167 divided by 646 is 6 with a remainder of 291.
Record the quotient 6 as the next digit in the result. 
Result so far: 25056.0
If we take 3876 away from 4167, we end up with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Going ahead to step 9:
646 goes into 2910 4 times with a remainder of 326.
The next digit of our result is 4. 
Result so far: 25056.4
Deduct 2584 from 2910 and we're left with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Let's proceed to step 10:
646 can be fit into 3260 5 times, resulting in a remainder of 30.
The next digit of our result is 5. 
Result so far: 25056.45
Deduct 3230 from 3260 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
When dividing 300 by 646, we get 0 with a remainder of 300.
The next digit of our result is 0. 
Result so far: 25056.45
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 12:
If we divide 3000 by 646, we get 4 and a remainder of 416.
Put 4 as the next digit of the answer. 
Result so far: 25056.4504
If we take 2584 away from 3000, we end up with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 13:
4160 divided by 646 is 6 with a remainder of 284.
Write down 6 as next digit of the result. 
Result so far: 25056.45046
Deduct 3876 from 4160 and we're left with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Let's proceed to step 14:
The number 646 fits into 2840 4 times, leaving a remainder of 256.
Use 4 as the next digit of our solution. 
Result so far: 25056.450464
If we take 2584 away from 2840, we end up with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

On to step 15:
When dividing 2560 by 646, we get 3 with a remainder of 622.
The number 3 becomes the next digit in our result. 
Result so far: 25056.4504643
If we take 1938 away from 2560, we end up with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 16:
The number 646 fits into 6220 9 times, leaving a remainder of 406.
Record the quotient 9 as the next digit in the result. 
Result so far: 25056.45046439
Deduct 5814 from 6220 and we're left with 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

The final result is 25056.45046439 with a remainder of 4.06e-07.