We divide 84781542 by 621
The aim is to understand the frequency of 621 in 84781542.

Advancing to step 1:
8 divided by 621 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 621

Moving on to step 2:
The number 621 fits into 84 0 times, leaving a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Bring next digit (7) of the dividend behind the 84 and repeat the process: 847 / 621

Moving on to step 3:
The number 621 fits into 847 1 times, leaving a remainder of 226.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 621 away from 847, we end up with 226.
Fetch the next digit (8) from the dividend, attach it to 226 and continue: 2268 / 621

Let's proceed to step 4:
When dividing 2268 by 621, we get 3 with a remainder of 405.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 1863 from 2268, we get 405.
Append the next digit (1) from the dividend to 405 and continue with: 4051 / 621

Let's proceed to step 5:
The number 621 fits into 4051 6 times, leaving a remainder of 325.
The next digit of our result is 6. 
Result so far: 136.0
If we subtract 3726 from 4051, we get 325.
Bring next digit (5) of the dividend behind the 325 and repeat the process: 3255 / 621

On to step 6:
The number 621 fits into 3255 5 times, leaving a remainder of 150.
Write down 5 as next digit of the result. 
Result so far: 1365.0
If we take 3105 away from 3255, we end up with 150.
Fetch the next digit (4) from the dividend, attach it to 150 and continue: 1504 / 621

Moving on to step 7:
621 goes into 1504 2 times with a remainder of 262.
Use 2 as the next digit of our solution. 
Result so far: 13652.0
Deduct 1242 from 1504 and we're left with 262.
Fetch the next digit (2) from the dividend, attach it to 262 and continue: 2622 / 621

Let's proceed to step 8:
If we divide 2622 by 621, we get 4 and a remainder of 138.
Record the quotient 4 as the next digit in the result. 
Result so far: 136524.0
Subtracting 2484 from 2622 leaves us with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 9:
The number 621 fits into 1380 2 times, leaving a remainder of 138.
Record the quotient 2 as the next digit in the result. 
Result so far: 136524.2
If we take 1242 away from 1380, we end up with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 10:
When dividing 1380 by 621, we get 2 with a remainder of 138.
Record the quotient 2 as the next digit in the result. 
Result so far: 136524.22
If we subtract 1242 from 1380, we get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

The quotient of the division is 136524.22, and the remainder is 0.138.