We divide 810294 by 4
The aim is to understand the frequency of 4 in 810294.

Going ahead to step 1:
If we divide 8 by 4, we get 2 and a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 8 from 8 to get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 4

Advancing to step 2:
The number 4 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 20.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 4

Going ahead to step 3:
If we divide 10 by 4, we get 2 and a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 202.0
Deduct 8 from 10 and we're left with 2.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 4

Advancing to step 4:
4 goes into 22 5 times with a remainder of 2.
Write down 5 as next digit of the result. 
Result so far: 2025.0
Subtract 20 from 22 to get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 4

Advancing to step 5:
4 goes into 29 7 times with a remainder of 1.
The next digit of our result is 7. 
Result so far: 20257.0
Deduct 28 from 29 and we're left with 1.
Include the next digit (4) from the dividend after 1, then repeat: 14 / 4

Going ahead to step 6:
If we divide 14 by 4, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 202573.0
If we take 12 away from 14, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
20 divided by 4 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 202573.5
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
When dividing 0 by 4, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 202573.5
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.

Let's proceed to step 9:
4 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 202573.5
If we subtract 0 from 0, 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.

The final outcome is 202573.5, with a leftover of 0.0.