87009817 ÷ 72 
We want to figure out the number of times 87009817 can be divided by 72.

Step 1:
72 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 72

On to step 2:
The number 72 fits into 87 1 times, leaving a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
If we take 72 away from 87, we end up with 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 72

On to step 3:
72 goes into 150 2 times with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 144 from 150, we get 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 72

On to step 4:
60 divided by 72 is 0 with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 120.0
If we take 0 away from 60, we end up with 60.
Bring next digit (9) of the dividend behind the 60 and repeat the process: 609 / 72

On to step 5:
72 goes into 609 8 times with a remainder of 33.
The number 8 becomes the next digit in our result. 
Result so far: 1208.0
Subtracting 576 from 609 leaves us with 33.
Include the next digit (8) from the dividend after 33, then repeat: 338 / 72

Step 6:
When dividing 338 by 72, we get 4 with a remainder of 50.
Put 4 as the next digit of the answer. 
Result so far: 12084.0
Subtract 288 from 338 to get 50.
Include the next digit (1) from the dividend after 50, then repeat: 501 / 72

Let's proceed to step 7:
If we divide 501 by 72, we get 6 and a remainder of 69.
Write down 6 as next digit of the result. 
Result so far: 120846.0
Deduct 432 from 501 and we're left with 69.
Bring next digit (7) of the dividend behind the 69 and repeat the process: 697 / 72

Step 8:
The number 72 fits into 697 9 times, leaving a remainder of 49.
The next digit of our result is 9. 
Result so far: 1208469.0
Subtracting 648 from 697 leaves us with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 9:
72 goes into 490 6 times with a remainder of 58.
The number 6 becomes the next digit in our result. 
Result so far: 1208469.6
The remainder is 58 after subtracting 432 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 10:
If we divide 580 by 72, we get 8 and a remainder of 4.
The next digit of our result is 8. 
Result so far: 1208469.68
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.

Let's proceed to step 11:
The number 72 fits into 40 0 times, leaving a remainder of 40.
The next digit of our result is 0. 
Result so far: 1208469.68
If we take 0 away from 40, we end up 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 12:
72 can be fit into 400 5 times, resulting in a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 1208469.6805
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 13:
72 can be fit into 400 5 times, resulting in a remainder of 40.
The next digit of our result is 5. 
Result so far: 1208469.68055
Subtract 360 from 400 to 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.

Our division results in 1208469.68055 with a remaining 4e-05.