Answer:
1863 m squared
Explanation:
So, the goal here is to find the area of each block individually then add it all together. In other words, you're gonna look for a way to solve for the missing square in the total large rectangle. Keep in mind 23 + 23 + 23 = 69 (aka the length of the whole rectangle)
So:
12 x 23 = the missing square = 276
31 x 69 = rectangle with the square = 2139
Total area = 2139 - 276 = 1863