Russian peasant algorithm written in Node.js

RussianPeasantAlgorithm.js

const assert = require('assert').strict

function russianPeasantAlgo(a, b) {
  aArray = []
  bArray = []

  // process first number
  while (a > 0.99) {
    aArray.push(a)
    a = Math.trunc(a / 2)
  }

  // process second number
  while (bArray.length != aArray.length) {
    bArray.push(b)
    b = b * 2
  }

  // make sure both arrays are of the same length
  assert.strictEqual(aArray.length, bArray.length)


  // remove elements in bArray that aArray's corresponding index is even number
  removeTheseIndexes = []
  aArray.forEach(num => {
    if (num % 2 == 0) {
      const evenNumIndex = aArray.indexOf(num)
      removeTheseIndexes.push(evenNumIndex)
    }
  })

  for (var i = removeTheseIndexes.length - 1; i >= 0; i--) {
    bArray.splice(removeTheseIndexes[i], 1)
  }

  // sum numbers in bArray
  const arrSum = arr => arr.reduce((a, b) => a + b, 0)
  const RPanswer = arrSum(bArray)
  return RPanswer
}

// randomly generate integers and check the algo's results
// against multiplication
const max = 99999999
for (let i = 0; i < 50; i++) {
  const a = Math.floor(Math.random() * Math.floor(max))
  const b = Math.floor(Math.random() * Math.floor(max))
  assert.strictEqual(a * b, russianPeasantAlgo(a, b))
}