multiplication

const (
	Yotta  = 1e24
	Zeta   = 1e21
	Exa    = 1e18
	Peta   = 1e15
	Tera   = 1e12
	Giga   = 1e9
	Mega   = 1e6
	Kilo   = 1e3
	Hector = 1e2
	Deka   = 1e1
	Deci   = 1e-1
	Centi  = 1e-2
	Milli  = 1e-3
	Micro  = 1e-6
	Nano   = 1e-9
	Pico   = 1e-12
	Femto  = 1e-15
	Atto   = 1e-18
	Zepto  = 1e-21
	Yocto  = 1e-24
)