Change Tiles

package main

import "fmt"

func main() {
    var areaSide int
    fmt.Scanln(&areaSide)

    var tileWidth, tileLength float64
    fmt.Scanln(&tileWidth)
    fmt.Scanln(&tileLength)

    var benchWidth, benchLength float64
    fmt.Scanln(&benchWidth)
    fmt.Scanln(&benchLength)

    area := float64(areaSide * areaSide) - benchLength * benchWidth
    tileArea := tileWidth * tileLength
    tiles := area / tileArea
    time := tiles * 0.2

    fmt.Printf("%f\n%f\n", tiles, time)
}