We're dividing 712790 by 90 
We want to figure out the number of times 712790 can be divided by 90.

Step 1:
7 divided by 90 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 90

Advancing to step 2:
71 divided by 90 is 0 with a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 71 to get 71.
Append the next digit (2) from the dividend to 71 and continue with: 712 / 90

Going ahead to step 3:
90 goes into 712 7 times with a remainder of 82.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 630 from 712 leaves us with 82.
Grab the next digit (7) from the dividend, add it to 82, then carry on: 827 / 90

Step 4:
If we divide 827 by 90, we get 9 and a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 79.0
If we take 810 away from 827, we end up with 17.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 90

Advancing to step 5:
90 can be fit into 179 1 times, resulting in a remainder of 89.
The next digit of our result is 1. 
Result so far: 791.0
If we subtract 90 from 179, we get 89.
Append the next digit (0) from the dividend to 89 and continue with: 890 / 90

Going ahead to step 6:
When dividing 890 by 90, we get 9 with a remainder of 80.
The number 9 becomes the next digit in our result. 
Result so far: 7919.0
The remainder is 80 after subtracting 810 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 7:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 7919.8
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 8:
If we divide 800 by 90, we get 8 and a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 7919.88
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 7919.88 with a remaining 0.08.