We're dividing 921642 by 72 
We want to figure out the number of times 921642 can be divided by 72.

Advancing to step 1:
The number 72 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 72

Advancing to step 2:
If we divide 92 by 72, we get 1 and a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 72 from 92 and we're left with 20.
Fetch the next digit (1) from the dividend, attach it to 20 and continue: 201 / 72

Step 3:
If we divide 201 by 72, we get 2 and a remainder of 57.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 144 from 201 to get 57.
Append the next digit (6) from the dividend to 57 and continue with: 576 / 72

Going ahead to step 4:
72 goes into 576 8 times with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 128.0
The remainder is 0 after subtracting 576 from 576.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 72

On to step 5:
When dividing 4 by 72, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 1280.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 72

On to step 6:
If we divide 42 by 72, we get 0 and a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 12800.0
The remainder is 42 after subtracting 0 from 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 7:
When dividing 420 by 72, we get 5 with a remainder of 60.
The next digit of our result is 5. 
Result so far: 12800.5
Deduct 360 from 420 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
72 can be fit into 600 8 times, resulting in a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 12800.58
If we take 576 away from 600, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 9:
72 goes into 240 3 times with a remainder of 24.
The next digit of our result is 3. 
Result so far: 12800.583
Subtracting 216 from 240 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
72 can be fit into 240 3 times, resulting in a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 12800.5833
Subtracting 216 from 240 leaves us with 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 result is 12800.5833 with a remainder of 0.00024.