On Tue, 09 Jul 2019 12:05:34 -0700 (Seattle), Jeff-Relf.Me wrote:

Google is my calculator.
Google: 72f in c=
0xf in decimal=
USD in Yen=

What could be easier than that ?

Pretty lame task though. Try the calculator with a discounted cash
flow or mortgage repayment question. An HP-12C it ain't!