calculator with programmability

例句：

1. 1. The calculatoris used to calculate the area of a circle.
   计算器用来计算圆的面积。
2. 2.He bought a new calculator as a birthday gift for his son.
   他买了一台新的计算器作为生日礼物送给他的儿子。
3. 3.She uses a calculator to keep track of her expenses.
   她使用计算器来记录她的开销。