781458 divided by 3 
The aim is to understand the frequency of 3 in 781458.

Step 1:
When dividing 7 by 3, we get 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 6 away from 7, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 3

Advancing to step 2:
18 divided by 3 is 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 26.0
Subtracting 18 from 18 leaves us with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 3

Let's proceed to step 3:
1 divided by 3 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 260.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 3

Advancing to step 4:
When dividing 14 by 3, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 2604.0
Subtracting 12 from 14 leaves us with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 3

Moving on to step 5:
25 divided by 3 is 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 26048.0
Subtracting 24 from 25 leaves us with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 3

Step 6:
3 can be fit into 18 6 times, resulting in a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 260486.0
If we subtract 18 from 18, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
When dividing 0 by 3, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 260486.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
3 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 260486.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 260486.0 with a remainder of 0.0.