Let's divide 21403770 by 491
The aim is to understand the frequency of 491 in 21403770.

Moving on to step 1:
The number 491 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
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 / 491

On to step 2:
491 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (4) of the dividend behind the 21 and repeat the process: 214 / 491

Advancing to step 3:
214 divided by 491 is 0 with a remainder of 214.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 214 after subtracting 0 from 214.
Take the next digit (0) from the dividend and append it to 214, then repeat: 2140 / 491

On to step 4:
491 goes into 2140 4 times with a remainder of 176.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 1964 from 2140 leaves us with 176.
Bring next digit (3) of the dividend behind the 176 and repeat the process: 1763 / 491

Advancing to step 5:
491 goes into 1763 3 times with a remainder of 290.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 1473 from 1763 leaves us with 290.
Fetch the next digit (7) from the dividend, attach it to 290 and continue: 2907 / 491

Advancing to step 6:
When dividing 2907 by 491, we get 5 with a remainder of 452.
Use 5 as the next digit of our solution. 
Result so far: 435.0
If we take 2455 away from 2907, we end up with 452.
Fetch the next digit (7) from the dividend, attach it to 452 and continue: 4527 / 491

On to step 7:
When dividing 4527 by 491, we get 9 with a remainder of 108.
The number 9 becomes the next digit in our result. 
Result so far: 4359.0
Subtracting 4419 from 4527 leaves us with 108.
Include the next digit (0) from the dividend after 108, then repeat: 1080 / 491

Moving on to step 8:
491 goes into 1080 2 times with a remainder of 98.
The next digit of our result is 2. 
Result so far: 43592.0
Subtract 982 from 1080 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Advancing to step 9:
491 goes into 980 1 times with a remainder of 489.
The next digit of our result is 1. 
Result so far: 43592.1
Subtract 491 from 980 to get 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

Moving on to step 10:
491 can be fit into 4890 9 times, resulting in a remainder of 471.
Write down 9 as next digit of the result. 
Result so far: 43592.19
If we take 4419 away from 4890, we end up with 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

Step 11:
491 can be fit into 4710 9 times, resulting in a remainder of 291.
Record the quotient 9 as the next digit in the result. 
Result so far: 43592.199
The remainder is 291 after subtracting 4419 from 4710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

The final outcome is 43592.199, with a leftover of 0.0291.