64943977 ÷ 839 
The aim is to understand the frequency of 839 in 64943977.

Advancing to step 1:
6 divided by 839 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 839

Let's proceed to step 2:
839 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Append the next digit (9) from the dividend to 64 and continue with: 649 / 839

Moving on to step 3:
If we divide 649 by 839, we get 0 and a remainder of 649.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 649, we end up with 649.
Append the next digit (4) from the dividend to 649 and continue with: 6494 / 839

Advancing to step 4:
When dividing 6494 by 839, we get 7 with a remainder of 621.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtract 5873 from 6494 to get 621.
Fetch the next digit (3) from the dividend, attach it to 621 and continue: 6213 / 839

Advancing to step 5:
839 goes into 6213 7 times with a remainder of 340.
Put 7 as the next digit of the answer. 
Result so far: 77.0
The remainder is 340 after subtracting 5873 from 6213.
Bring next digit (9) of the dividend behind the 340 and repeat the process: 3409 / 839

Let's proceed to step 6:
839 goes into 3409 4 times with a remainder of 53.
The number 4 becomes the next digit in our result. 
Result so far: 774.0
The remainder is 53 after subtracting 3356 from 3409.
Grab the next digit (7) from the dividend, add it to 53, then carry on: 537 / 839

Step 7:
The number 839 fits into 537 0 times, leaving a remainder of 537.
Write down 0 as next digit of the result. 
Result so far: 7740.0
If we take 0 away from 537, we end up with 537.
Append the next digit (7) from the dividend to 537 and continue with: 5377 / 839

Moving on to step 8:
The number 839 fits into 5377 6 times, leaving a remainder of 343.
Use 6 as the next digit of our solution. 
Result so far: 77406.0
Subtract 5034 from 5377 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Moving on to step 9:
839 can be fit into 3430 4 times, resulting in a remainder of 74.
The number 4 becomes the next digit in our result. 
Result so far: 77406.4
If we subtract 3356 from 3430, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 10:
839 goes into 740 0 times with a remainder of 740.
Use 0 as the next digit of our solution. 
Result so far: 77406.4
If we take 0 away from 740, we end up with 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

Moving on to step 11:
The number 839 fits into 7400 8 times, leaving a remainder of 688.
Write down 8 as next digit of the result. 
Result so far: 77406.408
If we subtract 6712 from 7400, we get 688.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Step 12:
The number 839 fits into 6880 8 times, leaving a remainder of 168.
The number 8 becomes the next digit in our result. 
Result so far: 77406.4088
If we take 6712 away from 6880, we end up with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Our division results in 77406.4088 with a remaining 0.00168.