A cafe has 9 indoor tables and 11 outdoor tables. Each indoor table has 10 chairs, and each outdoor table has 3 chairs. How many chairs are there in all?
Let's think step by step.
123
There are 9 indoor tables * 10 chairs = 90 chairs.

There are 11 outdoor tables * 3 chairs = 33 chairs.

The total number of chairs is 90 chairs + 33 chairs = 123 chairs.

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Thus, the answer is 123