For a wedding, chairs were arranged in 7 rows with 12 chairs in each row. Some people arrived late and grabbed 11 extra chairs, placing them at the back. How many chairs were there altogether? Let's think first. Chain of thought:
At first, there were 7 * 12 = 84 chairs. Later, there were 84 + 11 = 95 chairs altogether.
Therefore, the answer is 95.