Apple has been putting a strong effort into marketing the Apple Watch on U.S. prime-time television, Reuters reports. Since the March 9 Apple Watch event, the company has spent $38 million on its “Watch Reimagined” television campaign — only slightly less, in relative terms, than the $42 million Apple spent on TV spots for the iPhone 6 and iPhone 6 Plus. Out of more than 300 airings of the Apple Watch commercial, almost half have been…