function processData(input) {
    //Enter your code here
    var n = input.split(" ").map(Number);
    var a = n[0];
    var b = n[1];
    var c = n[2];
    
    var answer = (Math.pow((0.5 * (a + b)), c))%(Math.pow(10, 9)+7); 

    console.log(answer);
} 

process.stdin.resume();
process.stdin.setEncoding("ascii");
_input = "";
process.stdin.on("data", function (input) {
    _input += input;
});

process.stdin.on("end", function () {
   processData(_input);
});