Yeah it would be better to know the answer but one can't be too genius to secure full marks. In such case this comes to aid. Many students feel depressed when exam comes near and this can be their friend reducing mental problems. Both lazy and hard-working can be benefitted with this calculator and there is "Equality in Exam Results" thus bridging gap between talented and untalented one.

Calculator isn't cheating. You need it in exam to solve complex math and scientific problems. But taking ruby calculator is cheating btw. But why not utilize the cool inventions to its greater use lol