84470705 ÷ 399 
The aim is to understand the frequency of 399 in 84470705.

Going ahead to step 1:
8 divided by 399 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 399

Going ahead to step 2:
When dividing 84 by 399, we get 0 with a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 84 leaves us with 84.
Take the next digit (4) from the dividend and append it to 84, then repeat: 844 / 399

Advancing to step 3:
When dividing 844 by 399, we get 2 with a remainder of 46.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 798 away from 844, we end up with 46.
Include the next digit (7) from the dividend after 46, then repeat: 467 / 399

Moving on to step 4:
467 divided by 399 is 1 with a remainder of 68.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 399 from 467 leaves us with 68.
Grab the next digit (0) from the dividend, add it to 68, then carry on: 680 / 399

Advancing to step 5:
When dividing 680 by 399, we get 1 with a remainder of 281.
Use 1 as the next digit of our solution. 
Result so far: 211.0
If we subtract 399 from 680, we get 281.
Take the next digit (7) from the dividend and append it to 281, then repeat: 2817 / 399

On to step 6:
399 goes into 2817 7 times with a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 2117.0
If we take 2793 away from 2817, we end up with 24.
Take the next digit (0) from the dividend and append it to 24, then repeat: 240 / 399

Going ahead to step 7:
399 goes into 240 0 times with a remainder of 240.
The next digit of our result is 0. 
Result so far: 21170.0
The remainder is 240 after subtracting 0 from 240.
Grab the next digit (5) from the dividend, add it to 240, then carry on: 2405 / 399

Step 8:
When dividing 2405 by 399, we get 6 with a remainder of 11.
Use 6 as the next digit of our solution. 
Result so far: 211706.0
The remainder is 11 after subtracting 2394 from 2405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 9:
110 divided by 399 is 0 with a remainder of 110.
The number 0 becomes the next digit in our result. 
Result so far: 211706.0
Deduct 0 from 110 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 10:
The number 399 fits into 1100 2 times, leaving a remainder of 302.
Put 2 as the next digit of the answer. 
Result so far: 211706.02
Subtract 798 from 1100 to get 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

On to step 11:
If we divide 3020 by 399, we get 7 and a remainder of 227.
The next digit of our result is 7. 
Result so far: 211706.027
If we subtract 2793 from 3020, we get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 12:
2270 divided by 399 is 5 with a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 211706.0275
If we subtract 1995 from 2270, we get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 13:
The number 399 fits into 2750 6 times, leaving a remainder of 356.
The number 6 becomes the next digit in our result. 
Result so far: 211706.02756
Deduct 2394 from 2750 and we're left with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Going ahead to step 14:
If we divide 3560 by 399, we get 8 and a remainder of 368.
Record the quotient 8 as the next digit in the result. 
Result so far: 211706.027568
Subtracting 3192 from 3560 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Step 15:
399 can be fit into 3680 9 times, resulting in a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 211706.0275689
Subtracting 3591 from 3680 leaves us with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 16:
The number 399 fits into 890 2 times, leaving a remainder of 92.
Record the quotient 2 as the next digit in the result. 
Result so far: 211706.02756892
Subtracting 798 from 890 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

In conclusion, the division gives 211706.02756892 with a balance of 9.2e-08.