1. **State the problem:** Calculate the sum of 532 and 454345. 2. **Formula used:** Addition of two numbers is given by $$a + b$$ where $a=532$ and $b=454345$. 3. **Perform the addition:** $$532 + 454345 = 454877$$ 4. **Explanation:** Adding 532 to 454345 means combining their values to get a total amount. We align the numbers by place value and add each column starting from the right. 5. **Final answer:** $$\boxed{454877}$$