........¸„„¸................¸•°'To solve the riddle look inside'°•¸................¸„„¸........
...¸ ´...¸·.*¸.......¸ ˆ.....the number 81 you must divide....ˆ ¸.......¸*.·¸...` ¸...
.,'........'.„¸¸„. ‹ ´....'use the operation that has four sides'....` › .„¸¸„.'........',.
;'...................ˆ .,¸¸,,. - ¬»„ ¸¸,.‹¨`ˆ"°*^*°"ˆ´¨›.,¸¸ „«¬ - .,,¸¸,. ˆ...................';
Simple but nice! Is the eye purposely invisible (black)? Minus 1 points for that, also minus 3 points for Twitter advert x( Maybe you could align it right so it wouldn't interfere with the drawing?