fn main() {
    let mut vtp = String::new();
    std::io::stdin().read_line(&mut vtp).ok();
    let vtp: Vec<usize> = vtp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let v = vtp[0];
    let t = vtp[1];
    let p = vtp[2];

    let mut result = (p + 1) * v;
    let mut times = (result - 1) / t + 1;
    let mut prev_result = result;
    result += times;
    while result > prev_result {
        prev_result = result;
        let prev_times = times;
        times = (result - 1) / t + 1;
        result += times - prev_times;
    }
    println!("{}", result);
}