Let's divide 70431747 by 640
The aim is to understand the frequency of 640 in 70431747.

On to step 1:
7 divided by 640 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 640

Step 2:
If we divide 70 by 640, we get 0 and a remainder of 70.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 70 to get 70.
Include the next digit (4) from the dividend after 70, then repeat: 704 / 640

On to step 3:
704 divided by 640 is 1 with a remainder of 64.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 640 from 704 leaves us with 64.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 640

Let's proceed to step 4:
643 divided by 640 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 640 from 643 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 640

On to step 5:
31 divided by 640 is 0 with a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Subtract 0 from 31 to get 31.
Grab the next digit (7) from the dividend, add it to 31, then carry on: 317 / 640

Moving on to step 6:
317 divided by 640 is 0 with a remainder of 317.
The next digit of our result is 0. 
Result so far: 1100.0
If we take 0 away from 317, we end up with 317.
Take the next digit (4) from the dividend and append it to 317, then repeat: 3174 / 640

Advancing to step 7:
If we divide 3174 by 640, we get 4 and a remainder of 614.
Record the quotient 4 as the next digit in the result. 
Result so far: 11004.0
Subtract 2560 from 3174 to get 614.
Append the next digit (7) from the dividend to 614 and continue with: 6147 / 640

Going ahead to step 8:
If we divide 6147 by 640, we get 9 and a remainder of 387.
Use 9 as the next digit of our solution. 
Result so far: 110049.0
If we subtract 5760 from 6147, we get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Let's proceed to step 9:
If we divide 3870 by 640, we get 6 and a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 110049.6
Subtract 3840 from 3870 to get 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 10:
If we divide 300 by 640, we get 0 and a remainder of 300.
The next digit of our result is 0. 
Result so far: 110049.6
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.

Going ahead to step 11:
If we divide 3000 by 640, we get 4 and a remainder of 440.
The next digit of our result is 4. 
Result so far: 110049.604
The remainder is 440 after subtracting 2560 from 3000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

On to step 12:
If we divide 4400 by 640, we get 6 and a remainder of 560.
Record the quotient 6 as the next digit in the result. 
Result so far: 110049.6046
If we subtract 3840 from 4400, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Advancing to step 13:
640 can be fit into 5600 8 times, resulting in a remainder of 480.
Use 8 as the next digit of our solution. 
Result so far: 110049.60468
Deduct 5120 from 5600 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 14:
640 goes into 4800 7 times with a remainder of 320.
Use 7 as the next digit of our solution. 
Result so far: 110049.604687
The remainder is 320 after subtracting 4480 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 15:
3200 divided by 640 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 110049.6046875
Deduct 3200 from 3200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 16:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 110049.6046875
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 110049.6046875, with a leftover of 0.0.