To calculate the area of a rectangle with a length of $$7$$ and a breadth of $$5$$, we can use $$7\times 5$$. Therefore, the formula of a rectangle can be summarised as:． 
选项为:A:Area of rectangle $$=$$ breadth $$\times $$ breadth  B:Area of rectangle $$=$$ length $$\times $$ length  C:Area of rectangle $$=$$ length $$\times $$ breadth  请回答其中一个选项.