21791972 ÷ 213 
Our goal is to divide 21791972 by 213.

Moving on to step 1:
The number 213 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 213

Moving on to step 2:
If we divide 21 by 213, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (7) from the dividend after 21, then repeat: 217 / 213

On to step 3:
213 can be fit into 217 1 times, resulting in a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 213 from 217 leaves us with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 213

On to step 4:
213 goes into 49 0 times with a remainder of 49.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 49, we get 49.
Append the next digit (1) from the dividend to 49 and continue with: 491 / 213

Advancing to step 5:
213 can be fit into 491 2 times, resulting in a remainder of 65.
Record the quotient 2 as the next digit in the result. 
Result so far: 102.0
The remainder is 65 after subtracting 426 from 491.
Include the next digit (9) from the dividend after 65, then repeat: 659 / 213

Moving on to step 6:
When dividing 659 by 213, we get 3 with a remainder of 20.
Write down 3 as next digit of the result. 
Result so far: 1023.0
If we take 639 away from 659, we end up with 20.
Bring next digit (7) of the dividend behind the 20 and repeat the process: 207 / 213

Step 7:
When dividing 207 by 213, we get 0 with a remainder of 207.
Record the quotient 0 as the next digit in the result. 
Result so far: 10230.0
Subtract 0 from 207 to get 207.
Bring next digit (2) of the dividend behind the 207 and repeat the process: 2072 / 213

Moving on to step 8:
213 can be fit into 2072 9 times, resulting in a remainder of 155.
The number 9 becomes the next digit in our result. 
Result so far: 102309.0
Subtracting 1917 from 2072 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Step 9:
213 can be fit into 1550 7 times, resulting in a remainder of 59.
Record the quotient 7 as the next digit in the result. 
Result so far: 102309.7
If we subtract 1491 from 1550, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 10:
213 can be fit into 590 2 times, resulting in a remainder of 164.
Record the quotient 2 as the next digit in the result. 
Result so far: 102309.72
Deduct 426 from 590 and we're left with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Let's proceed to step 11:
213 goes into 1640 7 times with a remainder of 149.
Record the quotient 7 as the next digit in the result. 
Result so far: 102309.727
Subtracting 1491 from 1640 leaves us with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Moving on to step 12:
When dividing 1490 by 213, we get 6 with a remainder of 212.
Put 6 as the next digit of the answer. 
Result so far: 102309.7276
Deduct 1278 from 1490 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

On to step 13:
213 can be fit into 2120 9 times, resulting in a remainder of 203.
Record the quotient 9 as the next digit in the result. 
Result so far: 102309.72769
If we take 1917 away from 2120, we end up with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 14:
If we divide 2030 by 213, we get 9 and a remainder of 113.
The next digit of our result is 9. 
Result so far: 102309.727699
If we take 1917 away from 2030, we end up with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

After the division, we end up with 102309.727699 and a remainder of 1.13e-05.