We divide 31798990 by 420
The aim is to understand the frequency of 420 in 31798990.

Advancing to step 1:
3 divided by 420 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 420

Moving on to step 2:
420 goes into 31 0 times with a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Grab the next digit (7) from the dividend, add it to 31, then carry on: 317 / 420

Step 3:
317 divided by 420 is 0 with a remainder of 317.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 317 after subtracting 0 from 317.
Include the next digit (9) from the dividend after 317, then repeat: 3179 / 420

Moving on to step 4:
If we divide 3179 by 420, we get 7 and a remainder of 239.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtracting 2940 from 3179 leaves us with 239.
Take the next digit (8) from the dividend and append it to 239, then repeat: 2398 / 420

Step 5:
The number 420 fits into 2398 5 times, leaving a remainder of 298.
The number 5 becomes the next digit in our result. 
Result so far: 75.0
Subtracting 2100 from 2398 leaves us with 298.
Grab the next digit (9) from the dividend, add it to 298, then carry on: 2989 / 420

Moving on to step 6:
The number 420 fits into 2989 7 times, leaving a remainder of 49.
The next digit of our result is 7. 
Result so far: 757.0
Subtracting 2940 from 2989 leaves us with 49.
Bring next digit (9) of the dividend behind the 49 and repeat the process: 499 / 420

Let's proceed to step 7:
If we divide 499 by 420, we get 1 and a remainder of 79.
Record the quotient 1 as the next digit in the result. 
Result so far: 7571.0
Subtracting 420 from 499 leaves us with 79.
Bring next digit (0) of the dividend behind the 79 and repeat the process: 790 / 420

Advancing to step 8:
When dividing 790 by 420, we get 1 with a remainder of 370.
Use 1 as the next digit of our solution. 
Result so far: 75711.0
Subtract 420 from 790 to get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 9:
When dividing 3700 by 420, we get 8 with a remainder of 340.
Record the quotient 8 as the next digit in the result. 
Result so far: 75711.8
If we take 3360 away from 3700, we end up with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 10:
If we divide 3400 by 420, we get 8 and a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 75711.88
If we take 3360 away from 3400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The quotient of the division is 75711.88, and the remainder is 0.04.