题目

阅读理解I live in a small town near Xing'an in Guilin. You can't see it on the map of China, because it is too small. The air here is fresh. There are not many tall buildings in our town. The tallest building is in our school. There are four hundred students and twenty­five teachers in our school. In the front of the school, there is a playground. I often play basketball with my classmates on it. There is a little garden behind our school. And we can grow beautiful flowers and plant trees there. Next to the garden, there is an orange orchard(果园). You can hear birds singing everywhere.一个圆柱形机械零件，底面直径是3厘米，高是0.4厘米，将这个零件表面涂漆，涂漆的面积是多少平方厘米？