dog-years.js

function dogYears(planet, age) {
    const planets = {
        earth: 1,
        mercury: 0.2408467,
        venus: 0.61519726,
        mars: 1.8808158,
        jupiter: 11.862615,
        saturn: 29.447498,
        uranus: 84.016846,
        neptune: 164.79132,
    };
    let earthAge = (age / 31557600) * 7;

    return Number(Number(earthAge / planets[planet]).toFixed(2));
}