human: 计算 3 * 4 * 5 * 6 * 7 * 8 * 9。
 bot: Hmm, let me think. Okay, so we have 3 multiplied by 4, which is 12. Then we multiply that by 5, which gives us 60. Next, we multiply 60 by 6, which equals 360. After that, we multiply 360 by 7, resulting in 2520. Then we multiply 2520 by 8, which gives us 20160. Finally, we multiply 20160 by 9, and the answer is 181440.