We're dividing 72558165 by 31 
We want to figure out the number of times 72558165 can be divided by 31.

Step 1:
When dividing 7 by 31, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 31

Step 2:
The number 31 fits into 72 2 times, leaving a remainder of 10.
The next digit of our result is 2. 
Result so far: 2.0
If we take 62 away from 72, we end up with 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 31

Going ahead to step 3:
The number 31 fits into 105 3 times, leaving a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we subtract 93 from 105, we get 12.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 31

Advancing to step 4:
If we divide 125 by 31, we get 4 and a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 234.0
If we subtract 124 from 125, we get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 31

Going ahead to step 5:
31 can be fit into 18 0 times, resulting in a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 2340.0
If we subtract 0 from 18, we get 18.
Fetch the next digit (1) from the dividend, attach it to 18 and continue: 181 / 31

Step 6:
31 goes into 181 5 times with a remainder of 26.
Use 5 as the next digit of our solution. 
Result so far: 23405.0
The remainder is 26 after subtracting 155 from 181.
Fetch the next digit (6) from the dividend, attach it to 26 and continue: 266 / 31

Moving on to step 7:
The number 31 fits into 266 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 234058.0
If we take 248 away from 266, we end up with 18.
Append the next digit (5) from the dividend to 18 and continue with: 185 / 31

On to step 8:
185 divided by 31 is 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 2340585.0
If we take 155 away from 185, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
When dividing 300 by 31, we get 9 with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 2340585.9
Deduct 279 from 300 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 10:
If we divide 210 by 31, we get 6 and a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 2340585.96
Subtracting 186 from 210 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.

On to step 11:
If we divide 240 by 31, we get 7 and a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 2340585.967
The remainder is 23 after subtracting 217 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 12:
31 goes into 230 7 times with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 2340585.9677
The remainder is 13 after subtracting 217 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final outcome is 2340585.9677, with a leftover of 0.00013.