请设计一个通用程序，用来计算每一种交通工具行使1000公里所需的时间。已知每种交通工具的速度都是3个整数A、B、C的表达式。现有3种工具：Car 、Plane和Ship，其中Car 的速度运算公式为：A*B/C，Plane 的速度运算公式为：A＋B＋C，Ship的计算公式为A－B－C。-Please design a common procedure used to calculate the exercise of each type of transport time required for 1000 kilometers. Known to the speed of each vehicle are three integers A, B, C expression. Three kinds of tools available: Car, Plane and Ship, in which the speed of Car formula for computing: A* B/C, Plane formula for computing the rate of: A+ B+ C, Ship of the calculation formula for the A-B-C.