Xiaoqiao’s cloakroom is exactly a square with a side length of 3m. Xiaoqiao’s parents’ bedroom is four times the size of the cloakroom. How big is Xiaoqiao’s parents’ bedroom?
小巧家的衣帽间正好是边长为3m的正方形，小巧父母的卧房是衣帽间面积的4倍，小巧父母的卧房面积有多大？
<gadget id="calculator">3 * 3 * 4</gadget>
<output>36</output>

<result>36</result>