13．能用简便方法的就简便计算：
0 159747 159755 159761 159765 159771 159773 159777 159783 159785 159791 159797 159801 159803 159807 159813 159815 159821 159825 159827 159831 159833 159837 159839 159841 159842 159843 159845 159846 159847 159849 159851 159855 159857 159861 159863 159867 159873 159875 159881 159885 159887 159891 159897 159903 159905 159911 159915 159917 159923 159927 159933 159941 199269
| 47×63+63×53 | 99×83 | 102×34 |
| 840×20+148 | 540×（168-148） | 89×99+89 |