Using the formula for it, we have 500 (1+0.018/12)^(4*12) because 500 is the starting value, 1.8% = 0.018, and it's compounded 12 times/year. Plugging all that into a calculator, we have approximately 537.30 dollars after 4 years or 37.30 dollars in gained interest
A square has four sides and the area is 10,000 m^2. Area is determined by multiplying two sides. In this case, you can divide by two to get 5000, then again by 2 to get 2500. Each side/dimensions are 2500m^2