Let's divide 78307818 by 213
The aim is to understand the frequency of 213 in 78307818.

Step 1:
213 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 213

Advancing to step 2:
213 goes into 78 0 times with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Append the next digit (3) from the dividend to 78 and continue with: 783 / 213

Going ahead to step 3:
213 can be fit into 783 3 times, resulting in a remainder of 144.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 639 away from 783, we end up with 144.
Bring next digit (0) of the dividend behind the 144 and repeat the process: 1440 / 213

Let's proceed to step 4:
If we divide 1440 by 213, we get 6 and a remainder of 162.
The next digit of our result is 6. 
Result so far: 36.0
If we take 1278 away from 1440, we end up with 162.
Include the next digit (7) from the dividend after 162, then repeat: 1627 / 213

Moving on to step 5:
213 goes into 1627 7 times with a remainder of 136.
The next digit of our result is 7. 
Result so far: 367.0
Deduct 1491 from 1627 and we're left with 136.
Fetch the next digit (8) from the dividend, attach it to 136 and continue: 1368 / 213

Going ahead to step 6:
If we divide 1368 by 213, we get 6 and a remainder of 90.
Put 6 as the next digit of the answer. 
Result so far: 3676.0
If we take 1278 away from 1368, we end up with 90.
Append the next digit (1) from the dividend to 90 and continue with: 901 / 213

Let's proceed to step 7:
901 divided by 213 is 4 with a remainder of 49.
Record the quotient 4 as the next digit in the result. 
Result so far: 36764.0
If we subtract 852 from 901, we get 49.
Append the next digit (8) from the dividend to 49 and continue with: 498 / 213

Advancing to step 8:
498 divided by 213 is 2 with a remainder of 72.
The next digit of our result is 2. 
Result so far: 367642.0
Subtract 426 from 498 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
The number 213 fits into 720 3 times, leaving a remainder of 81.
Put 3 as the next digit of the answer. 
Result so far: 367642.3
Deduct 639 from 720 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 10:
213 can be fit into 810 3 times, resulting in a remainder of 171.
The next digit of our result is 3. 
Result so far: 367642.33
The remainder is 171 after subtracting 639 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Our division results in 367642.33 with a remaining 0.171.