Método replace com função

metodo-replace-com-funcao.js

const texto = `
Lista de jogos:
- Red dead redeption 2: R$ 180,00;
- The last of us 2: R$ 199,95;
- Resident Evil 2 remake: R$ 140,50;
`;
const regex = /(R\$)\s(\d*,\d*)/gmi;
const funcao = (match, p1, p2) => {
    const real = parseFloat(p2.replace(/,/g,'.'));
    const cotacao = 4.21;
    const dolar = (real / cotacao).toFixed(2)
    const result = dolar.toString().replace(/\./g,',');
    return `US$ ${result}` 
}
console.log(texto.replace(regex, funcao))
/*
- Red dead redeption 2: US$ 42,76;
- The last of us 2: US$ 47,49;
- Resident Evil 2 remake: US$ 33,37;
*/