text: const yargs = require('yargs/yargs')
  const { hideBin } = require('yargs/helpers')
  const argv = yargs(hideBin(process.argv)).argv
  
  const { add } = require('mathjs')
  const { multiply } = require('mathjs')
  
  // import {
  //     add
  //   } from 'mathjs'
  
  let a = 8, b = 84, c = 458;
  
  if(argv.a){
    console.log(argv.a)
    a = argv.a
  }
  
  
  
  if (argv.x) {
    console.log(add(a, b, c))
  }
  
  if (argv.y) {
    console.log(multiply(a, b, c))
  }
  console.log(argv.x)