How to solve 547X73
2 answers
http://www.google.com/search?q=smoke+contributed+to+cloud+formation&rlz=1C1AVSX_enUS414US423&oq=smoke+contributed+to+cloud+formation&aqs=chrome..69i57j0l2.1233j0j8&sourceid=chrome&espv=210&es_sm=122&ie=UTF-8#es_sm=122&espv=210&psj=1&q=547+*+73
http://awwapp.com/s/2d/80/b4.png