功能：完成两个n元多项式作乘法，给出明确的等式形式。

分步实施：1)． 初步完成总体设计，搭好框架，确定人机对话的界面，确定函数个数；

2)． 完成最低要求：建立一个文件，实现两个一元二次多项式作乘法。

3)． 进一步要求：实现三元二次多项式的乘法。 -Function: the completion of two n-polynomial for multiplication, given the form of a clear identity. Step by step: 1). Initially completed the overall design, improtance framework to determine the man-machine interface dialogue, to determine the function of the number　2). Complete the minimum requirements: the establishment of a document, to achieve two one dollar for a quadratic polynomial multiplication. 3). Further requirements: to achieve ternary quadratic polynomial multiplication.