diff --git a/math/math.go b/math/math.go
index 2bfb7b6..417668a 100644
--- a/math/math.go
+++ b/math/math.go
@@ -4 +4 @@ func Calculate(n int) int {
-	return n + 1
+	return n + 2
diff --git a/math/math_test.go b/math/math_test.go
index b56ca78..fb2977c 100644
--- a/math/math_test.go
+++ b/math/math_test.go
@@ -6,2 +6,2 @@ func TestCalculate(t *testing.T) {
-	if got := Calculate(5); got != 6 {
-		t.Fatalf("Calculate(5) = %d, want 6", got)
+	if got := Calculate(5); got != 7 {
+		t.Fatalf("Calculate(5) = %d, want 7", got)