2 files changed, 7 insertions, 2 deletions
diff --git a/client/simple/src/js/plugin/Calculator.ts b/client/simple/src/js/plugin/Calculator.ts
index 318dd8ec8..4d8b99bdd 100644
--- a/client/simple/src/js/plugin/Calculator.ts
+++ b/client/simple/src/js/plugin/Calculator.ts
@@ -80,7 +80,12 @@ export default class Calculator extends Plugin {
 
     try {
       const node = Calculator.math.parse(searchInput.value);
-      return `${node.toString()} = ${node.evaluate()}`;
+      const value = node.evaluate();
+      if (typeof value !== "number") {
+        return;
+      }
+
+      return `${node.toString()} = ${value}`;
     } catch {
       // not a compatible math expression
       return;
diff --git a/client/simple/src/js/util/appendAnswerElement.ts b/client/simple/src/js/util/appendAnswerElement.ts
index d21db3f48..8c3d52923 100644
--- a/client/simple/src/js/util/appendAnswerElement.ts
+++ b/client/simple/src/js/util/appendAnswerElement.ts
@@ -23,7 +23,7 @@ export const appendAnswerElement = (element: HTMLElement | string | number): voi
 
   if (!(element instanceof HTMLElement)) {
     const span = document.createElement("span");
-    span.innerHTML = element.toString();
+    span.textContent = element.toString();
     // biome-ignore lint/style/noParameterAssign: TODO
     element = span;
   }