1. **State the problem:** Calculate $13543^4$. 2. **Formula used:** To find the power of a number, multiply the number by itself as many times as the exponent indicates. Here, $13543^4 = 13543 \times 13543 \times 13543 \times 13543$. 3. **Step-by-step calculation:** - First, calculate $13543^2$: $$13543^2 = 13543 \times 13543 = 183,352,849$$ - Next, calculate $13543^4$ by squaring $13543^2$: $$13543^4 = (13543^2)^2 = 183,352,849^2$$ - Calculate $183,352,849^2$: $$183,352,849 \times 183,352,849 = 33,615,999,418,081,201$$ 4. **Final answer:** $$13543^4 = 33,615,999,418,081,201$$