22121 ÷ 72 
Let's see how many times 72 fits into 22121.

Step 1:
72 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 72

Advancing to step 2:
22 divided by 72 is 0 with a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 22 leaves us with 22.
Include the next digit (1) from the dividend after 22, then repeat: 221 / 72

Moving on to step 3:
The number 72 fits into 221 3 times, leaving a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 216 from 221, we get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 72

Moving on to step 4:
The number 72 fits into 52 0 times, leaving a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
If we take 0 away from 52, we end up with 52.
Fetch the next digit (1) from the dividend, attach it to 52 and continue: 521 / 72

Advancing to step 5:
If we divide 521 by 72, we get 7 and a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 307.0
Subtracting 504 from 521 leaves us 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.

Going ahead to step 6:
If we divide 170 by 72, we get 2 and a remainder of 26.
Record the quotient 2 as the next digit in the result. 
Result so far: 307.2
Deduct 144 from 170 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 7:
The number 72 fits into 260 3 times, leaving a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 307.23
If we subtract 216 from 260, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 8:
If we divide 440 by 72, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 307.236
If we take 432 away from 440, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 9:
The number 72 fits into 80 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 307.2361
If we subtract 72 from 80, 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.

Step 10:
72 goes into 80 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 307.23611
Subtracting 72 from 80 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 307.23611 with a remainder of 8e-06.