70935127 ÷ 421 
The aim is to understand the frequency of 421 in 70935127.

Going ahead to step 1:
If we divide 7 by 421, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 421

Going ahead to step 2:
When dividing 70 by 421, we get 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 70 and we're left with 70.
Take the next digit (9) from the dividend and append it to 70, then repeat: 709 / 421

Advancing to step 3:
When dividing 709 by 421, we get 1 with a remainder of 288.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 421 away from 709, we end up with 288.
Fetch the next digit (3) from the dividend, attach it to 288 and continue: 2883 / 421

Step 4:
If we divide 2883 by 421, we get 6 and a remainder of 357.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 2526 from 2883 leaves us with 357.
Fetch the next digit (5) from the dividend, attach it to 357 and continue: 3575 / 421

On to step 5:
If we divide 3575 by 421, we get 8 and a remainder of 207.
The next digit of our result is 8. 
Result so far: 168.0
Subtract 3368 from 3575 to get 207.
Include the next digit (1) from the dividend after 207, then repeat: 2071 / 421

Moving on to step 6:
When dividing 2071 by 421, we get 4 with a remainder of 387.
Put 4 as the next digit of the answer. 
Result so far: 1684.0
Deduct 1684 from 2071 and we're left with 387.
Take the next digit (2) from the dividend and append it to 387, then repeat: 3872 / 421

Step 7:
421 goes into 3872 9 times with a remainder of 83.
Write down 9 as next digit of the result. 
Result so far: 16849.0
If we take 3789 away from 3872, we end up with 83.
Grab the next digit (7) from the dividend, add it to 83, then carry on: 837 / 421

Advancing to step 8:
837 divided by 421 is 1 with a remainder of 416.
Write down 1 as next digit of the result. 
Result so far: 168491.0
If we subtract 421 from 837, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Step 9:
The number 421 fits into 4160 9 times, leaving a remainder of 371.
Record the quotient 9 as the next digit in the result. 
Result so far: 168491.9
The remainder is 371 after subtracting 3789 from 4160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Moving on to step 10:
When dividing 3710 by 421, we get 8 with a remainder of 342.
Use 8 as the next digit of our solution. 
Result so far: 168491.98
The remainder is 342 after subtracting 3368 from 3710.
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 11:
The number 421 fits into 3420 8 times, leaving a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 168491.988
Subtract 3368 from 3420 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The quotient of the division is 168491.988, and the remainder is 0.0052.