The code is as follows:

let earlyYears = 2;
// 'Let', since the value will change.

earlyYears *= 10.5;

let laterYears = myAge - 2
// Later years is my age -2, and let since it will change later on.

laterYears = laterYears * 4
// Calculates dog years after 2 years old.

console.log(earlyYears);
console.log(laterYears);

let myAgeInDogYears = earlyYears + laterYears
// Addition. Siempre.

const myName = 'Hongpeng'.toLowerCase();
// My name in lower case.

console.log(`My name is ${myName}. 
I am ${myAge} years old in human years, which is ${myAgeInDogYears} years old, 
in dog years.`)
// Basically tells both human and dog age.

What we can learn:

1. Dog Years and Human Years are complicated lol
2. The formulae for exchange

Disclaimer: Part of a Codecademy course on JS.