diff --git a/staff/joseramon-rodriguez/playground/calculator/index.ts b/staff/joseramon-rodriguez/playground/calculator/index.ts
new file mode 100644
index 0000000..617e2fc
--- /dev/null
+++ b/staff/joseramon-rodriguez/playground/calculator/index.ts
@@ -0,0 +1,24 @@
+function calculate(op: '+' | '-' | '*' | '/', x: number, y: number) {
+    switch (op) {
+        case '+':
+            return x + y
+        case '-':
+            return x - y
+        case '*':
+            return x * y
+        case '/':
+            return x / y
+    }
+}
+
+console.log(calculate('+', 1, 1))
+//2
+
+console.log(calculate('-', 1, 1))
+//0
+
+console.log(calculate('*', 1, 1))
+//1
+
+console.log(calculate('/', 2, 1))
+//2
\ No newline at end of file