diff --git a/f.go b/f.go
index adfeff9..d44a58e 100644
--- a/f.go
+++ b/f.go
@@ -69,18 +69,44 @@ func main() {
 		}
 
 		tokens := strings.Split(strings.TrimSpace(input), " ")
-		if len(tokens) != 2 {
-			fmt.Println("Please enter exactly two floats.")
-			continue
-		}
+		var err1, err2 error
 
-		new_low, err1 := strconv.ParseFloat(tokens[0], 64)
-		new_high, err2 := strconv.ParseFloat(tokens[1], 64)
-		if err1 != nil || err2 != nil {
-			fmt.Println("Invalid input. Please ensure you enter two floats.")
+		var new_low, new_high float64
+		switch len(tokens) {
+		case 0:
 			continue
-		}
+		case 1:
+			continue
+		case 2:
+			new_low, err1 = strconv.ParseFloat(tokens[0], 64)
+			new_high, err2 = strconv.ParseFloat(tokens[1], 64)
+			if err1 != nil || err2 != nil {
+				fmt.Println("Invalid input. Please ensure you enter two floats.")
+				continue
+			}
+		case 3:
+			switch tokens[0] {
+			case "*":
+				new_low, err1 = strconv.ParseFloat(tokens[1], 64)
+				new_high, err2 = strconv.ParseFloat(tokens[2], 64)
+				if err1 != nil || err2 != nil {
+					fmt.Println("Invalid input. Please ensure you enter two floats.")
+					continue
+				}
+			case "/":
+				new_low, err1 = strconv.ParseFloat(tokens[1], 64)
+				new_high, err2 = strconv.ParseFloat(tokens[2], 64)
+				if err1 != nil || err2 != nil {
+					fmt.Println("Invalid input. Please ensure you enter two floats.")
+					continue
+				}
+				tmp_low := new_low
+				new_low = 1.0 / new_high
+				new_high = 1.0 / tmp_low
+			default:
+			}
 
+		}
 		// Use the abstracted function for combining floats
 		old_low, old_high = combineBounds(old_low, old_high, new_low, new_high)
 		fmt.Printf("=> %.1f %.1f\n", old_low, old_high)
diff --git a/pianotuners.f b/pianotuners.f
deleted file mode 100644
index 5bddb95..0000000
--- a/pianotuners.f
+++ /dev/null
@@ -1,9 +0,0 @@
-Please enter exactly two floats.
-4000000 12000000
-=> 4000000.0 12000000.0
-0.005 0.01
-=> 25587.7 93795.1
-1/365 1/365
-Invalid input. Please ensure you enter two floats.
-1 1
-=> 25587.7 93795.1