let length = 5.kilometer + 7.meter  // 5007 meter
let weight = 10.0.kilogram * 5.gram // 50000 gram

2.week.to(unit: .hour) // 336 hour

let angle = 5.degree + 2.radian

let area = 5.acre + 2.hectare

let energy = 5.joule + 2.watthour

let metric = 5.base + 2.kilo

let volume = 5.liter + 2.gallon

let temperature = 5.fahrenheit + 2.celsius

let time = 5.day + 2.hour

let length = 5.yard + 2.meter

let weight = 5.kilogram + 2.pound