1. The problem statement, all variables and given/known data The speed limit on a particular stretch of road is 55 miles per hour. Express this speed limit in millifurlongs per microfortnight. A furlong is 1/8 mile, and a fortnight is a period of 2 weeks. 2. Relevant equations 3. The attempt at a solution so what I tried doing was taking 55 mph ( 8furlong/1mile ) ( 336hours/1fortnight ) = 147840 8 furlongs are in one mile and 336hours are in 1 fortnight. However the answer that I got isn't correct so I need to know what I'm doing wrong please.