paste into remote or paste into a txt file save as calc.mrc, then load -rs calc.mrc , right click in channel for use

menu * {
  Calculator
  .Calc:{
    if (!$dialog(calc)) {
      /dialog -m calc calc
    halt }
  }
}

dialog calc {
  title "Sw1ft's Calculator"
  size -1 -1 130 115
  option dbu

  menu "&File",1
  item "&About",2
  item "&Exit",3,default,ok
  menu "&Edit",4
  item "&Copy",5
  item "&Paste",6

  edit "",7,4 4 115 13,right
  edit "",8,4 20 20 20,read
  button "Backspace",9,28 22.2 30 15
  button "CE",10,62 22.2 30 15
  button "C",11,95 22.2 30 15
  button "MC",12,4 42.2 20 15
  button "MR",13,4 60.2 20 15
  button "MS",14,4 76.2 20 15
  button "M+",15,4 94.2 20 15
  button "7",16, 28 42.2 18 15
  button "8",17, 48 42.2 18 15
  button "9",18, 68 42.2 18 15
  button "/",19, 88 42.2 18 15
  button "sqrt",20, 108 42.2 18 15
  button "4",21, 28 60.2 18 15
  button "5",22, 48 60.2 18 15
  button "6",23, 68 60.2 18 15
  button "*",24, 88 60.2 18 15
  button "%",25, 108 60.2 18 15
  button "1",26, 28 76.2 18 15
  button "2",27, 48 76.2 18 15
  button "3",28, 68 76.2 18 15
  button "-",29,88 76.2 18 15
  button "1/x"30, 108 76.2 18 15 
  button "0",31, 28 94.2 18 15
  button "+/-",32, 48 94.2 18 15
  button ".",33, 68 94.2 18 15
  button "+",34, 88 94.2 18 15
  button "=",35, 108 94.2 18 15
}

dialog about {
  title "Sw1ft's Calulator"
  size -1 -1 100 75
  option dbu

  text "Sw1ft's Calculator, Deisnged and Made By Sw1ft, it is copyrighted @ #Royal-Cup, Thank you For Using It!",100, 20 15 50 50 30
}

on 1:dialog:calc:menu:*:{
  if ($did == 2) { /dialog -m about about | halt }
  if ($did == 5) { /cup -o %numbers %1numbers | unset %numbers | halt }
  if ($did == 6) { did -ra $dname 7 %1numbers | halt }
}

on 1:dialog:calc:close:*:{ unset %numbers }
on 1:dialog:calc:sclick:*:{
  if ($did == 10) { did -r $dname 7 | unset %numbers | halt }
  if ($did == 11) { did -r $dname 7 | unset %numbers | halt } 
  if ($did == 16) { did -a $dname 7 7 | set %numbers $addtok(%numbers,7,0) | halt }
  if ($did == 17) { did -a $dname 7 8 | set %numbers $addtok(%numbers,8,0) | halt }
  if ($did == 18) { did -a $dname 7 9 |  set %numbers $addtok(%numbers,9,0) | halt }
  if ($did == 19) { did -r $dname 7  | set %numbers $addtok(%numbers,/,0) | halt }
  if ($did == 21) { did -a $dname 7 4 | set %numbers $addtok(%numbers,4,0) | halt }
  if ($did == 22) { did -a $dname 7 5 | set %numbers $addtok(%numbers,5,0) | halt }
  if ($did == 23) { did -a $dname 7 6 | set %numbers $addtok(%numbers,6,0) | halt }
  if ($did == 24) { did -r $dname 7  | set %numbers $addtok(%numbers,*,0) | halt }
  if ($did == 25) { did -r $dname 7  | set %numbers $addtok(%numbers,%,0) | halt }
  if ($did == 26) { did -a $dname 7 1 | set %numbers $addtok(%numbers,1,0) | halt }
  if ($did == 27) { did -a $dname 7 2 | set %numbers $addtok(%numbers,2,0) | halt }
  if ($did == 28) { did -a $dname 7 3 | set %numbers $addtok(%numbers,3,0) | halt }
  if ($did == 31) { did -a $dname 7 0 | set %numbers $addtok(%numbers,0,0) | halt }
  if ($did == 33) { did -a $dname 7  | set %numbers $addtok(%numbers,.,0) | halt }
  if ($did == 34) { did -r $dname 7 | set %numbers $addtok(%numbers,+,0) | halt }
  if ($did == 29) { did -r $dname 7 | set %numbers $addtok(%numbers,-,0) | halt }
  if ($did == 35) { did -ar $dname 7 $calc(%numbers) | unset %numbers | halt }
  if ($did == 20) { did -ra $dname 7 $sqrt(5numbers) | unset %numbers | halt }
  if ($did == 9) { set %numbers $mid(%numbers,1,$calc($len(%numbers) -1)) | did -ra $dname 7 %numbers | halt }
  if ($did == 14) { 
  if (%numbers) { set %save %numbers | halt } }
  if ($did == 13) { unset %save | halt }
  if ($did == 30) { did -ra $dname 7 $calc(1 / %numbers)  | halt }
  if ($did == 32) { set %numbers $addtok(%numbers,-1,0) | did -ra $dname 7 $calc(%numbers) | halt }
  if ($did == 15) { set %save $calc(%save + %numbers) | did -ra $dname 7 %save | halt }
}