import scala.collection.mutable.*
import scala.io.StdIn.*
import scala.util.chaining.*
import scala.math.*
import scala.reflect.ClassTag
import scala.util.*
import scala.annotation.tailrec
import scala.collection.mutable



extension (value: Int)
  def powMod(exp: Int, mod: Int): Long =
    var result = 1L
    var base = value.toLong % mod
    var e = exp
    while e > 0 do
      if (e & 1) == 1 then
        result = result * base % mod
      base = base * base % mod
      e >>= 1
    result

@main def main =
  val testCase = readLine.toInt
  for _ <- 0 until testCase do
    val Array(a, b, c) = readLine.split(' ').map(_.toInt)
    val r = a * 10.powMod(c - 1, b) % b
    println(r * 10 / b)