Code violating SRP

shapes1.js

class Circle {
   constructor (radius) {
     this.radius = radius
   }
 }

 class Square {
   constructor (length) {
     this.length = length
   }
 }

 class AreaCalculator {
   constructor (shapes) {
     this.shapes = shapes
   }

   sum () {
     // logic to calculate the sum of the areas of the provided shapes
   }

   output () {
     return `The sum of all areas is ${this.sum()}.`
   }
 }