diff --git a/samples/calc-02/index.js b/samples/calc-02/index.js
index 1e5e467..06ae9f9 100644
--- a/samples/calc-02/index.js
+++ b/samples/calc-02/index.js
@@ -37,15 +37,15 @@ const keypadKeys = [
 	{ label: '7', input: '7', className: 'key-default' },
 	{ label: '8', input: '8', className: 'key-default' },
 	{ label: '9', input: '9', className: 'key-default' },
-	{ label: '/', action: 'div', className: 'key-accent' },
+	{ label: '÷', action: 'div', className: 'key-accent' },
 	{ label: '4', input: '4', className: 'key-default' },
 	{ label: '5', input: '5', className: 'key-default' },
 	{ label: '6', input: '6', className: 'key-default' },
-	{ label: '*', action: 'mul', className: 'key-accent' },
+	{ label: '×', action: 'mul', className: 'key-accent' },
 	{ label: '1', input: '1', className: 'key-default' },
 	{ label: '2', input: '2', className: 'key-default' },
 	{ label: '3', input: '3', className: 'key-default' },
-	{ label: '-', action: 'sub', className: 'key-accent' },
+	{ label: '−', action: 'sub', className: 'key-accent' },
 	{ label: '0', input: '0', className: 'key-default' },
 	{ label: '.', input: '.', className: 'key-default' },
 	{ label: '±', action: 'neg', className: 'key-default' },