import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.io.PrintWriter
import java.util.*

fun PrintWriter.solve(sc: FastScanner) {
    val t = sc.nextInt()
    for (_i in 0 until t) {
        val d = sc.nextLong()
        val a = sc.nextLong()
        val b = sc.nextLong()
        println(f(d, b) - f(d, a - 1))
    }
}

fun f(d: Long, a: Long): Long {
    if (a <= 0) return 0
    val r = a % (d - 1)
    return a / (d - 1) * (d * (d - 1) / 2) + r * (r + 1) / 2
}

fun main() {
    val writer = PrintWriter(System.out, false)
    writer.solve(FastScanner(System.`in`))
    writer.flush()
}

class FastScanner(s: InputStream) {
    private var st = StringTokenizer("")
    private val br = BufferedReader(InputStreamReader(s))

    fun next(): String {
        while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())

        return st.nextToken()
    }

    fun nextInt() = next().toInt()
    fun nextLong() = next().toLong()
    fun nextLine() = br.readLine()
    fun nextDouble() = next().toDouble()
    fun ready() = br.ready()
}