21436458 divided by 381 
The aim is to understand the frequency of 381 in 21436458.

Let's proceed to step 1:
2 divided by 381 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 381

On to step 2:
When dividing 21 by 381, we get 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 381

Advancing to step 3:
If we divide 214 by 381, we get 0 and a remainder of 214.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 214 leaves us with 214.
Grab the next digit (3) from the dividend, add it to 214, then carry on: 2143 / 381

Going ahead to step 4:
When dividing 2143 by 381, we get 5 with a remainder of 238.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 1905 away from 2143, we end up with 238.
Grab the next digit (6) from the dividend, add it to 238, then carry on: 2386 / 381

Step 5:
When dividing 2386 by 381, we get 6 with a remainder of 100.
Record the quotient 6 as the next digit in the result. 
Result so far: 56.0
If we subtract 2286 from 2386, we get 100.
Append the next digit (4) from the dividend to 100 and continue with: 1004 / 381

Moving on to step 6:
1004 divided by 381 is 2 with a remainder of 242.
The next digit of our result is 2. 
Result so far: 562.0
If we take 762 away from 1004, we end up with 242.
Fetch the next digit (5) from the dividend, attach it to 242 and continue: 2425 / 381

Step 7:
When dividing 2425 by 381, we get 6 with a remainder of 139.
The next digit of our result is 6. 
Result so far: 5626.0
The remainder is 139 after subtracting 2286 from 2425.
Bring next digit (8) of the dividend behind the 139 and repeat the process: 1398 / 381

On to step 8:
The number 381 fits into 1398 3 times, leaving a remainder of 255.
Record the quotient 3 as the next digit in the result. 
Result so far: 56263.0
If we take 1143 away from 1398, we end up with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Let's proceed to step 9:
When dividing 2550 by 381, we get 6 with a remainder of 264.
Use 6 as the next digit of our solution. 
Result so far: 56263.6
Subtracting 2286 from 2550 leaves us with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 10:
381 can be fit into 2640 6 times, resulting in a remainder of 354.
Write down 6 as next digit of the result. 
Result so far: 56263.66
Subtracting 2286 from 2640 leaves us with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

The final outcome is 56263.66, with a leftover of 0.354.