Calculating earnings (intro javascript style)

Write the JavaScript to read the number of hours worked from the user. Then write the JavaScript to calculate how much money the user made if they were paid $12/hour for the first 40 hours worked, and $18/hr for all hours worked over 40. Then use console.log to print out the hours entered and the total amount made.

So that's the code I have to write.

I can get the first part no problem from 0-40. But I can't figure out how to have and if/else statement calculate the first 40 at $12/h and the remaining at $18/h.

my code right now looks like

let hours = Number(prompt("Numbers of hours worked"))
console.log("# of hours worked is " +hours) 
let regularHours = (hours >=40
if (hours <= 40) {
    console.log("In " +hours+ " you made $" +hours *12)
} else {
    console.log("In " +hours+ "you made $" +)

can I define a variable to be like

let regularHours = hours <=40 *12

let overtimeHours = hours >40 *18

I tried that but it doesn't quite work.

Am I over complicating this?