Depends if you believe in the order of operations or not lol. Or have math skills > a starbucks barista who shares memes all day.
Yes, it's 120, per order of operations: 230 - 220 x 0.5 you do multiplication first 230 - (220 x 0.5) = 230 - 110 then subtraction 230 - 110 = 120
Don't let that smug prevent you from enjoying a "math pun" that is actually quite humorous for those intelligent enough to get it.