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JSFiddle - React, Tailwind, and code Playground

JavaScript

function velocidade(conf){
    return function(KmHora){
        var velocidade = typeof KmHora == 'number' ? KmHora : parseInt(KmHora, 10);
        var ms = velocidade * conf.fator;
        return [ms, conf.unidade].join(' ');
    }
}

var converter = velocidade({unidade:'m/s', fator: 1/3.6});
console.log(converter('300 km/h')); // 83.33333333333334 m/s

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