小明的妈妈今年的年龄是他的3倍，妈妈比小明大24岁，那小明今年（　　）岁．

阅读诗歌，回答问题。

                                                                                                                                       绝句

                                                                                                                                    (唐)杜甫

                                                                                                                    迟日江山丽，春风花草香。

                                                                                                                    泥融飞燕子，沙暖睡鸳鸯。

      【注释】泥融：指冻泥融化，又软又湿。