We divide 93900103 by 645
The aim is to understand the frequency of 645 in 93900103.

Going ahead to step 1:
9 divided by 645 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (3) of the dividend behind the 9 and repeat the process: 93 / 645

Advancing to step 2:
93 divided by 645 is 0 with a remainder of 93.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 93, we get 93.
Append the next digit (9) from the dividend to 93 and continue with: 939 / 645

Going ahead to step 3:
939 divided by 645 is 1 with a remainder of 294.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 294 after subtracting 645 from 939.
Bring next digit (0) of the dividend behind the 294 and repeat the process: 2940 / 645

Step 4:
If we divide 2940 by 645, we get 4 and a remainder of 360.
The next digit of our result is 4. 
Result so far: 14.0
If we subtract 2580 from 2940, we get 360.
Bring next digit (0) of the dividend behind the 360 and repeat the process: 3600 / 645

Step 5:
If we divide 3600 by 645, we get 5 and a remainder of 375.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
If we subtract 3225 from 3600, we get 375.
Take the next digit (1) from the dividend and append it to 375, then repeat: 3751 / 645

Moving on to step 6:
The number 645 fits into 3751 5 times, leaving a remainder of 526.
Use 5 as the next digit of our solution. 
Result so far: 1455.0
Subtracting 3225 from 3751 leaves us with 526.
Grab the next digit (0) from the dividend, add it to 526, then carry on: 5260 / 645

Step 7:
5260 divided by 645 is 8 with a remainder of 100.
Write down 8 as next digit of the result. 
Result so far: 14558.0
Subtracting 5160 from 5260 leaves us with 100.
Take the next digit (3) from the dividend and append it to 100, then repeat: 1003 / 645

Let's proceed to step 8:
If we divide 1003 by 645, we get 1 and a remainder of 358.
Write down 1 as next digit of the result. 
Result so far: 145581.0
Subtracting 645 from 1003 leaves us with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Advancing to step 9:
645 goes into 3580 5 times with a remainder of 355.
Record the quotient 5 as the next digit in the result. 
Result so far: 145581.5
If we subtract 3225 from 3580, we get 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Let's proceed to step 10:
The number 645 fits into 3550 5 times, leaving a remainder of 325.
Use 5 as the next digit of our solution. 
Result so far: 145581.55
Subtract 3225 from 3550 to get 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

In conclusion, the division gives 145581.55 with a balance of 0.325.