矩阵乘法计算量估算：输入多行，先输入要计算乘法的矩阵个数n，每个矩阵的行数，列数，总共2n的数，最后输入要计算的法则，输出需要进行的乘法次数(Matrix multiplication estimation: multi line input, input matrix to calculate the number of N matrix multiplication, each row number, column number, the total number of 2n, the last input to calculate the rule, the need to multiply the number of output)