57677863 ÷ 421 
The aim is to understand the frequency of 421 in 57677863.

Step 1:
The number 421 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 421

On to step 2:
If we divide 57 by 421, we get 0 and a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Take the next digit (6) from the dividend and append it to 57, then repeat: 576 / 421

Advancing to step 3:
When dividing 576 by 421, we get 1 with a remainder of 155.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 421 from 576 and we're left with 155.
Include the next digit (7) from the dividend after 155, then repeat: 1557 / 421

Moving on to step 4:
1557 divided by 421 is 3 with a remainder of 294.
The next digit of our result is 3. 
Result so far: 13.0
If we subtract 1263 from 1557, we get 294.
Grab the next digit (7) from the dividend, add it to 294, then carry on: 2947 / 421

Going ahead to step 5:
2947 divided by 421 is 7 with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 137.0
Subtracting 2947 from 2947 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 421

Step 6:
When dividing 8 by 421, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 1370.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 421

Moving on to step 7:
If we divide 86 by 421, we get 0 and a remainder of 86.
The next digit of our result is 0. 
Result so far: 13700.0
The remainder is 86 after subtracting 0 from 86.
Bring next digit (3) of the dividend behind the 86 and repeat the process: 863 / 421

Going ahead to step 8:
863 divided by 421 is 2 with a remainder of 21.
The number 2 becomes the next digit in our result. 
Result so far: 137002.0
Subtract 842 from 863 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 9:
421 can be fit into 210 0 times, resulting in a remainder of 210.
Write down 0 as next digit of the result. 
Result so far: 137002.0
Subtract 0 from 210 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Advancing to step 10:
421 goes into 2100 4 times with a remainder of 416.
Write down 4 as next digit of the result. 
Result so far: 137002.04
The remainder is 416 after subtracting 1684 from 2100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Let's proceed to step 11:
421 goes into 4160 9 times with a remainder of 371.
Write down 9 as next digit of the result. 
Result so far: 137002.049
Subtracting 3789 from 4160 leaves us with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Advancing to step 12:
The number 421 fits into 3710 8 times, leaving a remainder of 342.
Write down 8 as next digit of the result. 
Result so far: 137002.0498
Subtract 3368 from 3710 to get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Advancing to step 13:
When dividing 3420 by 421, we get 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 137002.04988
Deduct 3368 from 3420 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Our division results in 137002.04988 with a remaining 5.2e-05.