diff --git a/tools/server/public_simplechat/simplechat.js b/tools/server/public_simplechat/simplechat.js
index f0156e007f..618bb95679 100644
--- a/tools/server/public_simplechat/simplechat.js
+++ b/tools/server/public_simplechat/simplechat.js
@@ -586,12 +586,15 @@ class MultiChatUI {
 
     /**
      * Reset user input ui.
-     * * clear user input
+     * * clear user input (if requested, default true)
      * * enable user input
      * * set focus to user input
+     * @param {boolean} [bClearElInUser=true]
      */
-    ui_reset_userinput() {
-        this.elInUser.value = "";
+    ui_reset_userinput(bClearElInUser=true) {
+        if (bClearElInUser) {
+            this.elInUser.value = "";
+        }
         this.elInUser.disabled = false;
         this.elInUser.focus();
     }
@@ -718,7 +721,7 @@ class MultiChatUI {
         if (toolResult !== undefined) {
             this.elInUser.value = `<tool_response>${toolResult}</tool_response>`
         }
-        this.ui_reset_userinput();
+        this.ui_reset_userinput(toolResult === undefined);
     }
 
     /**
diff --git a/tools/server/public_simplechat/tooljs.mjs b/tools/server/public_simplechat/tooljs.mjs
index 628563ebd1..ae62fd0176 100644
--- a/tools/server/public_simplechat/tooljs.mjs
+++ b/tools/server/public_simplechat/tooljs.mjs
@@ -100,7 +100,7 @@ let calc_meta = {
  */
 function calc_run(obj) {
     console_redir()
-    let func = new Function(obj["arithexpr"])
+    let func = new Function(`console.log(${obj["arithexpr"]})`)
     func()
     console_revert()
     tc_switch["simple_calculator"]["result"] = gConsoleStr