We divide 85977666 by 421
The aim is to understand the frequency of 421 in 85977666.

Going ahead to step 1:
421 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 421

Going ahead to step 2:
When dividing 85 by 421, we get 0 with a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 85 and we're left with 85.
Take the next digit (9) from the dividend and append it to 85, then repeat: 859 / 421

Advancing to step 3:
When dividing 859 by 421, we get 2 with a remainder of 17.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 842 away from 859, we end up with 17.
Take the next digit (7) from the dividend and append it to 17, then repeat: 177 / 421

Step 4:
If we divide 177 by 421, we get 0 and a remainder of 177.
Write down 0 as next digit of the result. 
Result so far: 20.0
Subtract 0 from 177 to get 177.
Take the next digit (7) from the dividend and append it to 177, then repeat: 1777 / 421

Advancing to step 5:
When dividing 1777 by 421, we get 4 with a remainder of 93.
The number 4 becomes the next digit in our result. 
Result so far: 204.0
Deduct 1684 from 1777 and we're left with 93.
Fetch the next digit (6) from the dividend, attach it to 93 and continue: 936 / 421

Step 6:
If we divide 936 by 421, we get 2 and a remainder of 94.
Record the quotient 2 as the next digit in the result. 
Result so far: 2042.0
Subtracting 842 from 936 leaves us with 94.
Bring next digit (6) of the dividend behind the 94 and repeat the process: 946 / 421

On to step 7:
The number 421 fits into 946 2 times, leaving a remainder of 104.
Record the quotient 2 as the next digit in the result. 
Result so far: 20422.0
The remainder is 104 after subtracting 842 from 946.
Include the next digit (6) from the dividend after 104, then repeat: 1046 / 421

Moving on to step 8:
If we divide 1046 by 421, we get 2 and a remainder of 204.
Record the quotient 2 as the next digit in the result. 
Result so far: 204222.0
Subtracting 842 from 1046 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Let's proceed to step 9:
When dividing 2040 by 421, we get 4 with a remainder of 356.
Put 4 as the next digit of the answer. 
Result so far: 204222.4
Subtract 1684 from 2040 to get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Going ahead to step 10:
421 goes into 3560 8 times with a remainder of 192.
The next digit of our result is 8. 
Result so far: 204222.48
Deduct 3368 from 3560 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Advancing to step 11:
421 can be fit into 1920 4 times, resulting in a remainder of 236.
Record the quotient 4 as the next digit in the result. 
Result so far: 204222.484
Deduct 1684 from 1920 and we're left with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Let's proceed to step 12:
The number 421 fits into 2360 5 times, leaving a remainder of 255.
Put 5 as the next digit of the answer. 
Result so far: 204222.4845
Deduct 2105 from 2360 and we're left with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 13:
421 goes into 2550 6 times with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 204222.48456
Deduct 2526 from 2550 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 14:
421 can be fit into 240 0 times, resulting in a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 204222.48456
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 15:
421 goes into 2400 5 times with a remainder of 295.
Use 5 as the next digit of our solution. 
Result so far: 204222.4845605
If we subtract 2105 from 2400, we get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Moving on to step 16:
2950 divided by 421 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 204222.48456057
The remainder is 3 after subtracting 2947 from 2950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The quotient of the division is 204222.48456057, and the remainder is 3e-09.