We're dividing 512615 by 74 
We want to figure out the number of times 512615 can be divided by 74.

Advancing to step 1:
The number 74 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 74

Going ahead to step 2:
The number 74 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Take the next digit (2) from the dividend and append it to 51, then repeat: 512 / 74

On to step 3:
The number 74 fits into 512 6 times, leaving a remainder of 68.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 444 from 512, we get 68.
Take the next digit (6) from the dividend and append it to 68, then repeat: 686 / 74

On to step 4:
74 goes into 686 9 times with a remainder of 20.
Put 9 as the next digit of the answer. 
Result so far: 69.0
If we take 666 away from 686, we end up with 20.
Take the next digit (1) from the dividend and append it to 20, then repeat: 201 / 74

Going ahead to step 5:
201 divided by 74 is 2 with a remainder of 53.
Put 2 as the next digit of the answer. 
Result so far: 692.0
If we subtract 148 from 201, we get 53.
Take the next digit (5) from the dividend and append it to 53, then repeat: 535 / 74

On to step 6:
535 divided by 74 is 7 with a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 6927.0
Subtracting 518 from 535 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
170 divided by 74 is 2 with a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 6927.2
Deduct 148 from 170 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
If we divide 220 by 74, we get 2 and a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 6927.22
If we subtract 148 from 220, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

In conclusion, the division gives 6927.22 with a balance of 0.072.