We're dividing 512122 by 72 
Let's see how many times 72 fits into 512122.

Going ahead to step 1:
When dividing 5 by 72, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 72

Moving on to step 2:
72 goes into 51 0 times with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (2) from the dividend to 51 and continue with: 512 / 72

Let's proceed to step 3:
If we divide 512 by 72, we get 7 and a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 504 from 512 to get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 72

Let's proceed to step 4:
The number 72 fits into 81 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 71.0
Subtracting 72 from 81 leaves us with 9.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 72

Step 5:
92 divided by 72 is 1 with a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 711.0
If we subtract 72 from 92, we get 20.
Fetch the next digit (2) from the dividend, attach it to 20 and continue: 202 / 72

On to step 6:
72 goes into 202 2 times with a remainder of 58.
Put 2 as the next digit of the answer. 
Result so far: 7112.0
Subtract 144 from 202 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 7:
The number 72 fits into 580 8 times, leaving a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 7112.8
Subtract 576 from 580 to 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.

Let's proceed to step 8:
72 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 7112.8
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.

Going ahead to step 9:
72 can be fit into 400 5 times, resulting in a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 7112.805
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.

Let's proceed to step 10:
72 can be fit into 400 5 times, resulting in a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 7112.8055
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 7112.8055 with a remaining 0.0004.