We divide 274121 by 21
The aim is to understand the frequency of 21 in 274121.

Advancing to step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 21

Moving on to step 2:
21 can be fit into 27 1 times, resulting in a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 21 away from 27, we end up with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 21

On to step 3:
64 divided by 21 is 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtract 63 from 64 to get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 21

Advancing to step 4:
If we divide 11 by 21, we get 0 and a remainder of 11.
The next digit of our result is 0. 
Result so far: 130.0
Subtract 0 from 11 to get 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 21

On to step 5:
21 can be fit into 112 5 times, resulting in a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 1305.0
Subtracting 105 from 112 leaves us with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 21

On to step 6:
The number 21 fits into 71 3 times, leaving a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 13053.0
If we subtract 63 from 71, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 7:
80 divided by 21 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 13053.3
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 8:
If we divide 170 by 21, we get 8 and a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 13053.38
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
If we divide 20 by 21, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 13053.38
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
When dividing 200 by 21, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 13053.3809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 11:
21 can be fit into 110 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 13053.38095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 13053.380952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
If we divide 80 by 21, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 13053.3809523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 14:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 13053.38095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 13053.38095238, and the remainder is 2e-09.