Tuesday is quiz day: win Eamonn Coghlan´s book "Chairman of the Boards"

To get your hand on Eamonn Coghlan´s "Chairman of the Boards" you have to get the calc out!

We´re getting tricky with this one.

Please answer with the correct number at "message to mzungo". The first post win´s!

Best of luck!

(Eamon ran a 4:54.07 to set a indoor record over which distance?) MULTIPLY (Eamon and his wife Yvonne have how many children?) MINUS (How old was Eamon when he broke the over age 40 sub-four-minute mile) MINUS (Over which distance won Eamon European Indoor Championships?) MULTIPLY (How many indoor and outdoor sub 4 minute miles did he run?) DIVIDED (The Dublin District Number of his Birthplace Drimnagh!)