Zhang Hao has three beautiful tops in red, blue and white, and one pair of jeans, sports pants, and casual pants. If Zhang Hao wears one style a day, how many days can he wear different styles of clothes?
张浩有红色、蓝色、白色3件漂亮的上衣，还有牛仔裤、运动裤、休闲裤各一条．如果张浩一天穿一种式样，那么他最多在几天内穿的衣裤式样不同？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>