If you can't program, you can write a formula in Excel, enter the radius of the circle to be calculated in A 1, and enter "= a1* a1* 3.1415926" in quotation marks. After entering the carriage, you can get the area. Copy the contents of B 1 to B2, and you can calculate the circular area with radius of A2. Similarly, you can copy it to B3, B4, etc. There are other ways. Since you haven't made it clear, I won't say more.