Answer:
44334 is the answer.
Explanation:
As shown in the figure attached,
Length of the rectangle is represented by 821 (800 + 21) and width of the rectangle by 54(50 + 4).
800×50 = 40000
21×50 = 1050
800×4 = 3200
21×4 = 84
Now by adding all four multiplications we get the total of
40000 + 1050 + 3200 + 84 = 44334
Therefore, answer is 44334.