var s = require("fs").readFileSync("/dev/stdin", "utf8");
var cnt = 0;
s = s.replace(/\*|\+/g, function(op){
    ++cnt;

    if(op == "+")return ")*";
    if(op == "*")return ")+";
});
s = Array(cnt + 1).join("(") + s;
console.log(eval(s));