We divide 21215143 by 23
We're looking to find how many times 23 goes into 21215143.

Going ahead to step 1:
When dividing 2 by 23, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 23

Step 2:
23 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (2) from the dividend to 21 and continue with: 212 / 23

Advancing to step 3:
23 goes into 212 9 times with a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 207 from 212 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 23

Let's proceed to step 4:
The number 23 fits into 51 2 times, leaving a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
Subtract 46 from 51 to get 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 23

On to step 5:
55 divided by 23 is 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 922.0
If we take 46 away from 55, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 23

Moving on to step 6:
When dividing 91 by 23, we get 3 with a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 9223.0
The remainder is 22 after subtracting 69 from 91.
Take the next digit (4) from the dividend and append it to 22, then repeat: 224 / 23

Going ahead to step 7:
The number 23 fits into 224 9 times, leaving a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 92239.0
Subtract 207 from 224 to get 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 23

Moving on to step 8:
When dividing 173 by 23, we get 7 with a remainder of 12.
The next digit of our result is 7. 
Result so far: 922397.0
Subtract 161 from 173 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
When dividing 120 by 23, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 922397.5
Subtracting 115 from 120 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
The number 23 fits into 50 2 times, leaving a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 922397.52
Deduct 46 from 50 and we're left 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 11:
If we divide 40 by 23, we get 1 and a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 922397.521
Deduct 23 from 40 and we're left with 17.
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 12:
When dividing 170 by 23, we get 7 with a remainder of 9.
The next digit of our result is 7. 
Result so far: 922397.5217
Subtracting 161 from 170 leaves us with 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 13:
23 can be fit into 90 3 times, resulting in a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 922397.52173
If we subtract 69 from 90, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 14:
210 divided by 23 is 9 with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 922397.521739
The remainder is 3 after subtracting 207 from 210.
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:
23 goes into 30 1 times with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 922397.5217391
The remainder is 7 after subtracting 23 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 16:
23 can be fit into 70 3 times, resulting in a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 922397.52173913
Subtracting 69 from 70 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.

The final outcome is 922397.52173913, with a leftover of 1e-09.