For years Britons have found the metric system difficult to deal with. Here are some conversion factors that may simplify things:

1 million microphones = 1 megaphone

2000 mockingbirds = 2 kilomockingbirds

10 cards = 1 decacards

1 millionth of a fish = 1 microfiche

10 millipedes = 1 centipede

3 1/3 tridents = 1 decadent

1000 aches: 1 megahertz

5 dialogues: 1 decalogue

100 MPs: Not 1 decision