Silliest Google conversion

Oliver Brown
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If you didn’t know, Google can do clever unit conversions. Example conversions include:

1 mile in km 4 weeks in days 4.9 lightyears in au

You can even use compound units:

55 mph in m/s 20 N/(m^2) in Pascals

In fact you can use arbitrary compound units. The silliest I managed to find is:

2 great gross speed of light in bakers dozen furlongs per year

A great gross is 12 gross (a gross is 144). A bakers dozen is 13. A furlong is 220 yards.