We look at the division of 72163531 by 993 
We're looking to find how many times 993 goes into 72163531.

Step 1:
993 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 993

Moving on to step 2:
When dividing 72 by 993, we get 0 with a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 72 leaves us with 72.
Fetch the next digit (1) from the dividend, attach it to 72 and continue: 721 / 993

Step 3:
993 goes into 721 0 times with a remainder of 721.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 721, we end up with 721.
Include the next digit (6) from the dividend after 721, then repeat: 7216 / 993

Moving on to step 4:
If we divide 7216 by 993, we get 7 and a remainder of 265.
The next digit of our result is 7. 
Result so far: 7.0
If we take 6951 away from 7216, we end up with 265.
Bring next digit (3) of the dividend behind the 265 and repeat the process: 2653 / 993

On to step 5:
When dividing 2653 by 993, we get 2 with a remainder of 667.
Write down 2 as next digit of the result. 
Result so far: 72.0
Subtracting 1986 from 2653 leaves us with 667.
Grab the next digit (5) from the dividend, add it to 667, then carry on: 6675 / 993

Advancing to step 6:
993 goes into 6675 6 times with a remainder of 717.
Use 6 as the next digit of our solution. 
Result so far: 726.0
Subtracting 5958 from 6675 leaves us with 717.
Append the next digit (3) from the dividend to 717 and continue with: 7173 / 993

Advancing to step 7:
The number 993 fits into 7173 7 times, leaving a remainder of 222.
Put 7 as the next digit of the answer. 
Result so far: 7267.0
If we take 6951 away from 7173, we end up with 222.
Include the next digit (1) from the dividend after 222, then repeat: 2221 / 993

On to step 8:
2221 divided by 993 is 2 with a remainder of 235.
The next digit of our result is 2. 
Result so far: 72672.0
Subtracting 1986 from 2221 leaves us with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 9:
The number 993 fits into 2350 2 times, leaving a remainder of 364.
The next digit of our result is 2. 
Result so far: 72672.2
Deduct 1986 from 2350 and we're left with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Let's proceed to step 10:
993 can be fit into 3640 3 times, resulting in a remainder of 661.
Use 3 as the next digit of our solution. 
Result so far: 72672.23
The remainder is 661 after subtracting 2979 from 3640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6610, and continue the process.

Let's proceed to step 11:
If we divide 6610 by 993, we get 6 and a remainder of 652.
Use 6 as the next digit of our solution. 
Result so far: 72672.236
Subtracting 5958 from 6610 leaves us with 652.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

Let's proceed to step 12:
6520 divided by 993 is 6 with a remainder of 562.
Write down 6 as next digit of the result. 
Result so far: 72672.2366
Deduct 5958 from 6520 and we're left with 562.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

The final outcome is 72672.2366, with a leftover of 0.00562.