What is output of the following c++ code?

Question

#include<iostream>
using namespace std;
int main()
{
int a=5,b=10;
int c=++a*b--;
cout<<c*b;
return 0;
}

Answer 1

540

a became 6 thn multiplied with 10 gives 60
now value of b decreases and became 9
c=c*b = 60*9=540

Answer 2

Correct...

Answer 3

540