We look at the division of 57907794 by 420 
The aim is to understand the frequency of 420 in 57907794.

Let's proceed to step 1:
The number 420 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 420

On to step 2:
57 divided by 420 is 0 with a remainder of 57.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Bring next digit (9) of the dividend behind the 57 and repeat the process: 579 / 420

Step 3:
420 can be fit into 579 1 times, resulting in a remainder of 159.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 420 from 579 to get 159.
Bring next digit (0) of the dividend behind the 159 and repeat the process: 1590 / 420

Let's proceed to step 4:
420 goes into 1590 3 times with a remainder of 330.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 330 after subtracting 1260 from 1590.
Fetch the next digit (7) from the dividend, attach it to 330 and continue: 3307 / 420

Going ahead to step 5:
If we divide 3307 by 420, we get 7 and a remainder of 367.
Record the quotient 7 as the next digit in the result. 
Result so far: 137.0
Subtract 2940 from 3307 to get 367.
Bring next digit (7) of the dividend behind the 367 and repeat the process: 3677 / 420

Going ahead to step 6:
420 can be fit into 3677 8 times, resulting in a remainder of 317.
The next digit of our result is 8. 
Result so far: 1378.0
Deduct 3360 from 3677 and we're left with 317.
Bring next digit (9) of the dividend behind the 317 and repeat the process: 3179 / 420

Let's proceed to step 7:
420 can be fit into 3179 7 times, resulting in a remainder of 239.
Write down 7 as next digit of the result. 
Result so far: 13787.0
Subtract 2940 from 3179 to get 239.
Grab the next digit (4) from the dividend, add it to 239, then carry on: 2394 / 420

On to step 8:
The number 420 fits into 2394 5 times, leaving a remainder of 294.
Use 5 as the next digit of our solution. 
Result so far: 137875.0
Deduct 2100 from 2394 and we're left with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Going ahead to step 9:
420 can be fit into 2940 7 times, resulting in a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 137875.7
If we take 2940 away from 2940, 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.

Advancing to step 10:
The number 420 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 137875.7
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 11:
0 divided by 420 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 137875.7
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 137875.7, with a leftover of 0.0.