'use strict'

function Main(input) {
    input = input.split("\n")[0]
    input = input.split(' ').map(str => parseInt(str, 10))
    const span = input[0]
    const amount = input[1]
    const maxTime = input[2] 

   const shou = Math.floor(maxTime / span)

   console.log(shou * amount)
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"))