this is not a real math, but you can find the answer. it's hidden somewhere in the pic.

(2:22 pm)hint: look up and head north

(2:24 pm) hint 2: you know you can right click...

(2:26 pm)hint number 3, colon, you are 'L' bar

(2:30 pm) answer found by the awesum  InuyashaWolf

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ANSWERS
look at the file name! it clearly says "the answer is 42"
hint1: hinting to your url bar
hint2: yep right click > view image info
hint3: 'you are 'L'' = URL , again hinting the url bar.