alias calc {
  dialog -m calc calc
  Calculator:/calc 
}
dialog calc {
  title "Calculator"
  size -1 -1 70 53
  option dbu
  text "Equation", 6, 6 2 53 13
  text "Answer", 7, 6 20 53 13
  edit "", 1, 12 10 50 10
  edit "", 4, 12 27 50 10
  button "Calc", 2, 15 40 20 10, flat
  button "Cancel", 3, 38 40 20 10, flat, cancel
}
on *:dialog:calc:sclick:2:{
  did -a $dname 4 $calc($did(1)) 
}