class Matrix:

    def __init__(self, data): #takes in a double array no matter the size of it.
        self.data = data
        self.rows = len(data) #determines row by number of items in list
        self.cols = len(data[0]) #determines columns by number of items withing list of a list
        self.size = [self.rows, self.cols] #determines how big the matrix is by number of rows and columns


    def multiply(self, other):
        result = [[]]
        if self.size != other.size:
            return "dimensions are not the same"
        else:
            for i in range(self.rows):

                # iterating by coloum by B
                for j in range(other.cols):

                    # iterating by rows of B
                    for k in range(other.rows):

                        result[i][j] += self.data[i][k] * other.data[k][j]

            return(result)