229399 ÷ 21 
We're looking to find how many times 21 goes into 229399.

On to step 1:
21 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 21

On to step 2:
22 divided by 21 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 21 from 22 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 21

Advancing to step 3:
21 can be fit into 19 0 times, resulting in a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 19, we get 19.
Grab the next digit (3) from the dividend, add it to 19, then carry on: 193 / 21

Moving on to step 4:
If we divide 193 by 21, we get 9 and a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 109.0
Subtracting 189 from 193 leaves us with 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 21

Step 5:
21 can be fit into 49 2 times, resulting in a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 1092.0
Subtract 42 from 49 to get 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 21

On to step 6:
21 goes into 79 3 times with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 10923.0
Deduct 63 from 79 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The next digit of our result is 7. 
Result so far: 10923.7
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 8:
If we divide 130 by 21, we get 6 and a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 10923.76
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 10923.761
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 10:
21 can be fit into 190 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 10923.7619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
21 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 10923.7619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
If we divide 100 by 21, we get 4 and a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 10923.761904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 13:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 10923.7619047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 14:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 10923.76190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 10923.76190476 with a remaining 4e-09.