21497969 divided by 436 
The aim is to understand the frequency of 436 in 21497969.

Step 1:
When dividing 2 by 436, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 436

Going ahead to step 2:
The number 436 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 436

Step 3:
214 divided by 436 is 0 with a remainder of 214.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 214, we get 214.
Append the next digit (9) from the dividend to 214 and continue with: 2149 / 436

On to step 4:
436 goes into 2149 4 times with a remainder of 405.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 1744 from 2149 to get 405.
Include the next digit (7) from the dividend after 405, then repeat: 4057 / 436

On to step 5:
When dividing 4057 by 436, we get 9 with a remainder of 133.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
The remainder is 133 after subtracting 3924 from 4057.
Bring next digit (9) of the dividend behind the 133 and repeat the process: 1339 / 436

On to step 6:
1339 divided by 436 is 3 with a remainder of 31.
Write down 3 as next digit of the result. 
Result so far: 493.0
Subtract 1308 from 1339 to get 31.
Bring next digit (6) of the dividend behind the 31 and repeat the process: 316 / 436

On to step 7:
When dividing 316 by 436, we get 0 with a remainder of 316.
Put 0 as the next digit of the answer. 
Result so far: 4930.0
If we take 0 away from 316, we end up with 316.
Fetch the next digit (9) from the dividend, attach it to 316 and continue: 3169 / 436

Moving on to step 8:
3169 divided by 436 is 7 with a remainder of 117.
Use 7 as the next digit of our solution. 
Result so far: 49307.0
Subtracting 3052 from 3169 leaves us with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Step 9:
436 goes into 1170 2 times with a remainder of 298.
Put 2 as the next digit of the answer. 
Result so far: 49307.2
If we subtract 872 from 1170, we get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Let's proceed to step 10:
When dividing 2980 by 436, we get 6 with a remainder of 364.
The number 6 becomes the next digit in our result. 
Result so far: 49307.26
The remainder is 364 after subtracting 2616 from 2980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 11:
436 can be fit into 3640 8 times, resulting in a remainder of 152.
The number 8 becomes the next digit in our result. 
Result so far: 49307.268
If we subtract 3488 from 3640, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

On to step 12:
436 goes into 1520 3 times with a remainder of 212.
Write down 3 as next digit of the result. 
Result so far: 49307.2683
If we subtract 1308 from 1520, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

On to step 13:
436 goes into 2120 4 times with a remainder of 376.
The next digit of our result is 4. 
Result so far: 49307.26834
Subtract 1744 from 2120 to get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

On to step 14:
436 goes into 3760 8 times with a remainder of 272.
The next digit of our result is 8. 
Result so far: 49307.268348
If we subtract 3488 from 3760, we get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Let's proceed to step 15:
2720 divided by 436 is 6 with a remainder of 104.
Record the quotient 6 as the next digit in the result. 
Result so far: 49307.2683486
Deduct 2616 from 2720 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 16:
1040 divided by 436 is 2 with a remainder of 168.
The next digit of our result is 2. 
Result so far: 49307.26834862
If we subtract 872 from 1040, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

After the division, we end up with 49307.26834862 and a remainder of 1.68e-07.