A study in measurements, part 4

Note that:

1 rod = 198 inches

1 feet = 12 inches

1 mile = 5280 feet

8 furlongs = 1 mile

1 day = 24 hours

1 fortnight = 14 days

Then,

$5 \dfrac{rods}{hour}\left(\dfrac{198~in}{1~rod}\right)\left(\dfrac{1~ft}{12~in}\right)\left(\dfrac{1~mile}{5280~ft}\right)\left(\dfrac{8~furlongs}{1~mile}\right)\left(\dfrac{24~hr}{1~day}\right)\left(\dfrac{14~days}{1~fortnight}\right)=$ $\color{#D61F06}\boxed{42 \dfrac{furlongs}{fortnight}}$

1 rod = 16.5 feet

1 furlong = 660 feet = 40 rods

1 fortnight = 14 days = 336 hours

So 5 rods per hour = 5 * (336/40) = 42 furlongs per fortnight.