true
1.foot = '1'
10.feet = '10'
5.yards = '15'
3.miles = '15840'
8.miles = '42240'
10.feet = '10'
(30.feet+10.yards).in_yards = '20.0'
10_000.feet.in_miles = '1.8939394'
1.foot.in_miles = '0.0001894'
1.mile.in_feet = '5280.0'