3088271 divided by 644 
The aim is to understand the frequency of 644 in 3088271.

Going ahead to step 1:
If we divide 3 by 644, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 644

Moving on to step 2:
644 can be fit into 30 0 times, resulting in a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 30, we get 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 644

On to step 3:
When dividing 308 by 644, we get 0 with a remainder of 308.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 308 after subtracting 0 from 308.
Bring next digit (8) of the dividend behind the 308 and repeat the process: 3088 / 644

On to step 4:
644 goes into 3088 4 times with a remainder of 512.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 512 after subtracting 2576 from 3088.
Include the next digit (2) from the dividend after 512, then repeat: 5122 / 644

Moving on to step 5:
The number 644 fits into 5122 7 times, leaving a remainder of 614.
The next digit of our result is 7. 
Result so far: 47.0
If we subtract 4508 from 5122, we get 614.
Append the next digit (7) from the dividend to 614 and continue with: 6147 / 644

Advancing to step 6:
If we divide 6147 by 644, we get 9 and a remainder of 351.
The number 9 becomes the next digit in our result. 
Result so far: 479.0
Deduct 5796 from 6147 and we're left with 351.
Fetch the next digit (1) from the dividend, attach it to 351 and continue: 3511 / 644

Going ahead to step 7:
If we divide 3511 by 644, we get 5 and a remainder of 291.
Put 5 as the next digit of the answer. 
Result so far: 4795.0
The remainder is 291 after subtracting 3220 from 3511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

On to step 8:
644 goes into 2910 4 times with a remainder of 334.
Use 4 as the next digit of our solution. 
Result so far: 4795.4
If we subtract 2576 from 2910, we get 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

Going ahead to step 9:
When dividing 3340 by 644, we get 5 with a remainder of 120.
Put 5 as the next digit of the answer. 
Result so far: 4795.45
Deduct 3220 from 3340 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 10:
644 can be fit into 1200 1 times, resulting in a remainder of 556.
The next digit of our result is 1. 
Result so far: 4795.451
Subtracting 644 from 1200 leaves us with 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Let's proceed to step 11:
644 goes into 5560 8 times with a remainder of 408.
Write down 8 as next digit of the result. 
Result so far: 4795.4518
Subtracting 5152 from 5560 leaves us with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Going ahead to step 12:
The number 644 fits into 4080 6 times, leaving a remainder of 216.
Use 6 as the next digit of our solution. 
Result so far: 4795.45186
The remainder is 216 after subtracting 3864 from 4080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Moving on to step 13:
When dividing 2160 by 644, we get 3 with a remainder of 228.
Record the quotient 3 as the next digit in the result. 
Result so far: 4795.451863
If we subtract 1932 from 2160, we get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 14:
644 goes into 2280 3 times with a remainder of 348.
Put 3 as the next digit of the answer. 
Result so far: 4795.4518633
If we take 1932 away from 2280, we end up with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Our division results in 4795.4518633 with a remaining 3.48e-06.