Hi there!
The question is asking which garden is larger in area. To answer that question, find the area of both gardens.
The gardens are rectangular, so we will be using the formula for the area of a rectangle.
That formula is:

Where: A area, l = length, and w = width.
For Karl's garden, l = 20 and w = 45:


So the area of Karl's garden is 900 ft².
For Makenna's garden, l = 25 and w = 40.


Therefore, Makenna's garden is larger in area.
Have a fantastic day!