We look at the division of 72990071 by 17 
We want to figure out the number of times 72990071 can be divided by 17.

Moving on to step 1:
17 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 17

Step 2:
17 goes into 72 4 times with a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 68 away from 72, we end up with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 17

On to step 3:
49 divided by 17 is 2 with a remainder of 15.
The next digit of our result is 2. 
Result so far: 42.0
Subtract 34 from 49 to get 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 17

Let's proceed to step 4:
17 goes into 159 9 times with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 429.0
The remainder is 6 after subtracting 153 from 159.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 17

Advancing to step 5:
If we divide 60 by 17, we get 3 and a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 4293.0
Subtract 51 from 60 to get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 17

Going ahead to step 6:
When dividing 90 by 17, we get 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 42935.0
Deduct 85 from 90 and we're left with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 17

Advancing to step 7:
When dividing 57 by 17, we get 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 429353.0
Subtracting 51 from 57 leaves us with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 17

On to step 8:
17 can be fit into 61 3 times, resulting in a remainder of 10.
The next digit of our result is 3. 
Result so far: 4293533.0
Subtracting 51 from 61 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
100 divided by 17 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 4293533.5
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 10:
If we divide 150 by 17, we get 8 and a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 4293533.58
Subtract 136 from 150 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 11:
17 can be fit into 140 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 4293533.588
If we subtract 136 from 140, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 4293533.588 with a remainder of 0.0004.