function gcd(m, n) {
  // 剰余
  var r;

  if(m < n) {  // m >= nにする
    r = m;  //一時退避
    m = n;
    n = r;
  }

  while ((r = m % n) != 0) {
    m = n;
    n = r;
  }

  return n;
}
function Main(a, b){
    console.log('%d',a * b / gcd(a, b));
}