LUXEMBOURG—A 4.34 billion euro ($5 billion) European Union antitrust fine was based on flawed calculations, Alphabet’s Google said on Thursday, urging Europe’s second-highest court to scrap or reduce what it said was not an appropriate penalty. Google was fined for using its Android mobile operating system to thwart rivals and cement its dominance in general internet search from 2011, in the largest penalty meted out to any company found guilty of breaching EU antitrust rules. “The fine that was imposed, a staggering 4.34 billion euros, was not appropriate,” Google’s lawyer Genevra Forwood told the five-judge panel of the General Court on the fourth day of a week-long hearing, which is taking place three years after the European Commission sanctioned the company. “The problem is not the headline-grabbing fine per se. The problem is how the commission reached that figure,” she said. Forwood said there was no anti-competitive intent in Google’s …