215986 ÷ 72 
We want to figure out the number of times 215986 can be divided by 72.

Step 1:
72 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 72

Step 2:
If we divide 21 by 72, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 72

Going ahead to step 3:
When dividing 215 by 72, we get 2 with a remainder of 71.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 71 after subtracting 144 from 215.
Bring next digit (9) of the dividend behind the 71 and repeat the process: 719 / 72

Moving on to step 4:
The number 72 fits into 719 9 times, leaving a remainder of 71.
The next digit of our result is 9. 
Result so far: 29.0
Subtract 648 from 719 to get 71.
Grab the next digit (8) from the dividend, add it to 71, then carry on: 718 / 72

Moving on to step 5:
72 goes into 718 9 times with a remainder of 70.
Put 9 as the next digit of the answer. 
Result so far: 299.0
If we subtract 648 from 718, we get 70.
Fetch the next digit (6) from the dividend, attach it to 70 and continue: 706 / 72

Moving on to step 6:
The number 72 fits into 706 9 times, leaving a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 2999.0
Subtract 648 from 706 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 7:
72 goes into 580 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 2999.8
Deduct 576 from 580 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.

Moving on to step 8:
When dividing 40 by 72, we get 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 2999.8
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 9:
If we divide 400 by 72, we get 5 and a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 2999.805
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
72 can be fit into 400 5 times, resulting in a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 2999.8055
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 2999.8055 with a remainder of 0.0004.