388221 divided by 72 
Our goal is to divide 388221 by 72.

Step 1:
When dividing 3 by 72, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 72

Going ahead to step 2:
72 can be fit into 38 0 times, resulting in a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 38 to get 38.
Include the next digit (8) from the dividend after 38, then repeat: 388 / 72

On to step 3:
388 divided by 72 is 5 with a remainder of 28.
The next digit of our result is 5. 
Result so far: 5.0
If we take 360 away from 388, we end up with 28.
Bring next digit (2) of the dividend behind the 28 and repeat the process: 282 / 72

Moving on to step 4:
72 goes into 282 3 times with a remainder of 66.
Put 3 as the next digit of the answer. 
Result so far: 53.0
The remainder is 66 after subtracting 216 from 282.
Take the next digit (2) from the dividend and append it to 66, then repeat: 662 / 72

Going ahead to step 5:
72 goes into 662 9 times with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 539.0
If we take 648 away from 662, we end up with 14.
Bring next digit (1) of the dividend behind the 14 and repeat the process: 141 / 72

Advancing to step 6:
72 can be fit into 141 1 times, resulting in a remainder of 69.
Put 1 as the next digit of the answer. 
Result so far: 5391.0
If we take 72 away from 141, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 7:
The number 72 fits into 690 9 times, leaving a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 5391.9
Subtract 648 from 690 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 8:
72 goes into 420 5 times with a remainder of 60.
Use 5 as the next digit of our solution. 
Result so far: 5391.95
If we subtract 360 from 420, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
72 goes into 600 8 times with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 5391.958
If we subtract 576 from 600, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
72 can be fit into 240 3 times, resulting in a remainder of 24.
The next digit of our result is 3. 
Result so far: 5391.9583
If we subtract 216 from 240, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 11:
72 goes into 240 3 times with a remainder of 24.
Record the quotient 3 as the next digit in the result. 
Result so far: 5391.95833
Subtract 216 from 240 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final outcome is 5391.95833, with a leftover of 2.4e-05.