810/90 = 9.
You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer.
9
58
9
0.0333
9 divided by 810 is 1/20 or 0.05
The LCM is 810.
80.7716
sine 810 = sine 90 = 1
0.0111
45
9*9 = 81 81*10 = 810 so 9*90 = 810 and, therefore, 810/9 = 90
9.3372
90
Yes; 810 divided by 3 is 270.