30426147 ÷ 21 
Let's see how many times 21 fits into 30426147.

Going ahead to step 1:
3 divided by 21 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 21

Advancing to step 2:
21 goes into 30 1 times with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 21 from 30 to get 9.
Grab the next digit (4) from the dividend, add it to 9, then carry on: 94 / 21

Moving on to step 3:
If we divide 94 by 21, we get 4 and a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 14.0
If we subtract 84 from 94, we get 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 21

Step 4:
The number 21 fits into 102 4 times, leaving a remainder of 18.
Write down 4 as next digit of the result. 
Result so far: 144.0
Subtract 84 from 102 to get 18.
Append the next digit (6) from the dividend to 18 and continue with: 186 / 21

Let's proceed to step 5:
21 can be fit into 186 8 times, resulting in a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 1448.0
If we take 168 away from 186, we end up with 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 21

On to step 6:
21 goes into 181 8 times with a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 14488.0
Subtract 168 from 181 to get 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

Step 7:
21 can be fit into 134 6 times, resulting in a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 144886.0
Subtract 126 from 134 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 21

On to step 8:
21 can be fit into 87 4 times, resulting in a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 1448864.0
If we subtract 84 from 87, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
If we divide 30 by 21, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1448864.1
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
If we divide 90 by 21, we get 4 and a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 1448864.14
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 11:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 1448864.142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 12:
When dividing 180 by 21, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 1448864.1428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
21 goes into 120 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 1448864.14285
If we take 105 away from 120, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 14:
If we divide 150 by 21, we get 7 and a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 1448864.142857
If we take 147 away from 150, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 15:
30 divided by 21 is 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1448864.1428571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 16:
If we divide 90 by 21, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 1448864.14285714
If we subtract 84 from 90, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

In conclusion, the division gives 1448864.14285714 with a balance of 6e-09.