题目内容：

整数竖式乘法练习题

优质解答

21x45=
35x25=
66x16=
76x78=
87x89=
123x456=
123x543=
87x45=
321x98=
876x8=
87x111=
12x123=
65x98=
109x101=
12x101=
92x120=
143x12=
101x102=
98x12=