on *TEXT:!lb2kg *:#: {
  if ($2 isnum) && ($2 > 1) {
    msg $chan $2 Lbs is about equal to $calc($2 / 2.2) Kgs.
    {halt}
  }
  esleif ($2 == 1) {
    msg $chan $2 Lb is about equal to $calc($2 / 2.2) Kgs.
  }

on *TEXT: !kg2lb *:#: {
if ($2 isnum && ($2 > 1) {
msg $chan $2 Kgs is about equal to $calc($2 * 2.2) Lbs.
{halt}
}
esleif ($2 == 1) {
msg $chan $2 Kg is about equal to $calc($2 * 2.2) Lbs.
}