diff --git a/src/spider/runtime/math/Quat_Multiply.cpp b/src/spider/runtime/math/Quat_Multiply.cpp
new file mode 100644
index 0000000..f41651c
--- /dev/null
+++ b/src/spider/runtime/math/Quat_Multiply.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+
+template<typename T>
+struct Quaternion {
+    T w, x, y, z;
+};
+
+template<typename T>
+Quaternion<T> quat_multiply(Quaternion<T> A, Quaternion<T> B) {
+    return {
+        B.w * A.w - B.x * A.x - B.y * A.y - B.z * A.z,
+        B.w * A.x + B.x * A.w - B.y * A.z + B.z * A.y,
+        B.w * A.y + B.x * A.z + B.y * A.w - B.z * A.x,
+        B.w * A.z - B.x * A.y + B.y * A.x + B.z * A.w
+    };
+}
+
+int main() {
+    Quaternion<double> q1 = {1.0f, 0.0f, 0.0f, 0.0f};
+    Quaternion<double> q2 = {0.5f, 0.5f, 0.5f, 0.5f};
+    
+    Quaternion<double> result = quat_multiply(q1, q2);  // Returns the result!
+    
+    std::cout << "Result: (" 
+              << result.w << ", "
+              << result.x << ", "
+              << result.y << ", "
+              << result.z << ")" << std::endl;
+    
+    return 0;
+}
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