We divide 71466080 by 644
The aim is to understand the frequency of 644 in 71466080.

On to step 1:
When dividing 7 by 644, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 644

Advancing to step 2:
644 goes into 71 0 times with a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Bring next digit (4) of the dividend behind the 71 and repeat the process: 714 / 644

Let's proceed to step 3:
644 goes into 714 1 times with a remainder of 70.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 644 from 714 and we're left with 70.
Include the next digit (6) from the dividend after 70, then repeat: 706 / 644

On to step 4:
The number 644 fits into 706 1 times, leaving a remainder of 62.
The next digit of our result is 1. 
Result so far: 11.0
If we take 644 away from 706, we end up with 62.
Include the next digit (6) from the dividend after 62, then repeat: 626 / 644

Step 5:
644 goes into 626 0 times with a remainder of 626.
Write down 0 as next digit of the result. 
Result so far: 110.0
The remainder is 626 after subtracting 0 from 626.
Append the next digit (0) from the dividend to 626 and continue with: 6260 / 644

On to step 6:
If we divide 6260 by 644, we get 9 and a remainder of 464.
The number 9 becomes the next digit in our result. 
Result so far: 1109.0
If we subtract 5796 from 6260, we get 464.
Bring next digit (8) of the dividend behind the 464 and repeat the process: 4648 / 644

Let's proceed to step 7:
If we divide 4648 by 644, we get 7 and a remainder of 140.
Put 7 as the next digit of the answer. 
Result so far: 11097.0
Deduct 4508 from 4648 and we're left with 140.
Bring next digit (0) of the dividend behind the 140 and repeat the process: 1400 / 644

Step 8:
When dividing 1400 by 644, we get 2 with a remainder of 112.
Put 2 as the next digit of the answer. 
Result so far: 110972.0
If we take 1288 away from 1400, we end up with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 9:
If we divide 1120 by 644, we get 1 and a remainder of 476.
Use 1 as the next digit of our solution. 
Result so far: 110972.1
If we take 644 away from 1120, we end up with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Let's proceed to step 10:
644 goes into 4760 7 times with a remainder of 252.
The number 7 becomes the next digit in our result. 
Result so far: 110972.17
Subtract 4508 from 4760 to get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

On to step 11:
When dividing 2520 by 644, we get 3 with a remainder of 588.
The number 3 becomes the next digit in our result. 
Result so far: 110972.173
If we subtract 1932 from 2520, we get 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Going ahead to step 12:
644 goes into 5880 9 times with a remainder of 84.
The number 9 becomes the next digit in our result. 
Result so far: 110972.1739
Subtract 5796 from 5880 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 13:
If we divide 840 by 644, we get 1 and a remainder of 196.
Use 1 as the next digit of our solution. 
Result so far: 110972.17391
The remainder is 196 after subtracting 644 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 14:
If we divide 1960 by 644, we get 3 and a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 110972.173913
Subtracting 1932 from 1960 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 15:
The number 644 fits into 280 0 times, leaving a remainder of 280.
The next digit of our result is 0. 
Result so far: 110972.173913
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 16:
2800 divided by 644 is 4 with a remainder of 224.
The next digit of our result is 4. 
Result so far: 110972.17391304
Subtract 2576 from 2800 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

The final result is 110972.17391304 with a remainder of 2.24e-07.