find the largest value in an array them multiply it by 73 then add it into a new array

const arr = [4, 5, 6, 7, 8, 9, 4]
let newArr = []

const largest = (array) => {
    array.forEach(num => {
        let largest = array[0]
        if (num > largest){
            largest = num
        }
        newArr.push(largest * 73)
    })
}

largest(arr)