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Please help me solve the math multiplication in grade two.
12*3 34*5 56*7 67*8 78*9 89* 1 9 1*8 46*7 49*9 42*7 63*8 97*9

1. A pen 2 yuan, how much does it cost to buy 1 1 a pen?

2. Xiaoming left in one minute 100 meters. He walked for 8 minutes. How many meters did he walk?

There are 7 rows of chairs in the classroom, with 8 chairs in each row. How many chairs are there in the classroom?