A building has 20 floors. Each floor is 3 meters high, except for the last two floors. The last two floors are each 0.5 meters higher. How tall is the building? Let's think step by step and output the final answer after "####".
user
There are 20 - 2 = <<20-2=18>>18 floors that are each 3 meters high.
So the first 18 floors is 18 x 3 = <<18*3=54>>54 meters high.
The last two floors are each 3 + 0.5 = <<3+0.5=3.5>>3.5 meters high.
So the total height of the last two floors is 3.5 x 2 = <<3.5*2=7>>7 meters.
Therefore, the building is 54 + 7 = <<54+7=61>>61 meters high.
#### 61
A building has 20 floors. Each floor is 3 meters high, except for the last two floors. The last two floors are each 0.5 meters higher. How tall is the building?
train