We divide 42503906 by 420
The aim is to understand the frequency of 420 in 42503906.

Advancing to step 1:
420 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 420

Moving on to step 2:
The number 420 fits into 42 0 times, leaving a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 420

Moving on to step 3:
The number 420 fits into 425 1 times, leaving a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 420 from 425 to get 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 420

Advancing to step 4:
420 can be fit into 50 0 times, resulting in a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we subtract 0 from 50, we get 50.
Fetch the next digit (3) from the dividend, attach it to 50 and continue: 503 / 420

On to step 5:
420 goes into 503 1 times with a remainder of 83.
Use 1 as the next digit of our solution. 
Result so far: 101.0
If we take 420 away from 503, we end up with 83.
Include the next digit (9) from the dividend after 83, then repeat: 839 / 420

Advancing to step 6:
The number 420 fits into 839 1 times, leaving a remainder of 419.
Write down 1 as next digit of the result. 
Result so far: 1011.0
Deduct 420 from 839 and we're left with 419.
Take the next digit (0) from the dividend and append it to 419, then repeat: 4190 / 420

Advancing to step 7:
When dividing 4190 by 420, we get 9 with a remainder of 410.
Use 9 as the next digit of our solution. 
Result so far: 10119.0
Deduct 3780 from 4190 and we're left with 410.
Include the next digit (6) from the dividend after 410, then repeat: 4106 / 420

Let's proceed to step 8:
If we divide 4106 by 420, we get 9 and a remainder of 326.
Record the quotient 9 as the next digit in the result. 
Result so far: 101199.0
Deduct 3780 from 4106 and we're left with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

On to step 9:
The number 420 fits into 3260 7 times, leaving a remainder of 320.
Use 7 as the next digit of our solution. 
Result so far: 101199.7
If we take 2940 away from 3260, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 10:
420 goes into 3200 7 times with a remainder of 260.
The next digit of our result is 7. 
Result so far: 101199.77
Subtracting 2940 from 3200 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Our division results in 101199.77 with a remaining 0.26.