Let's divide 81931203 by 780
The aim is to understand the frequency of 780 in 81931203.

On to step 1:
If we divide 8 by 780, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 780

Going ahead to step 2:
The number 780 fits into 81 0 times, leaving a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 780

Moving on to step 3:
780 goes into 819 1 times with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 780 from 819 leaves us with 39.
Fetch the next digit (3) from the dividend, attach it to 39 and continue: 393 / 780

Let's proceed to step 4:
When dividing 393 by 780, we get 0 with a remainder of 393.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 393, we end up with 393.
Append the next digit (1) from the dividend to 393 and continue with: 3931 / 780

On to step 5:
780 goes into 3931 5 times with a remainder of 31.
Put 5 as the next digit of the answer. 
Result so far: 105.0
If we subtract 3900 from 3931, we get 31.
Append the next digit (2) from the dividend to 31 and continue with: 312 / 780

Going ahead to step 6:
If we divide 312 by 780, we get 0 and a remainder of 312.
Write down 0 as next digit of the result. 
Result so far: 1050.0
Deduct 0 from 312 and we're left with 312.
Grab the next digit (0) from the dividend, add it to 312, then carry on: 3120 / 780

Advancing to step 7:
780 can be fit into 3120 4 times, resulting in a remainder of 0.
The next digit of our result is 4. 
Result so far: 10504.0
The remainder is 0 after subtracting 3120 from 3120.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 780

Let's proceed to step 8:
The number 780 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 105040.0
If we subtract 0 from 3, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
30 divided by 780 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 105040.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
When dividing 300 by 780, we get 0 with a remainder of 300.
Put 0 as the next digit of the answer. 
Result so far: 105040.0
Subtract 0 from 300 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 105040.0, with a leftover of 0.3.