price = 100tax = price * 0.05苹果 = 8.5total = 苹果 * 10 + tax(12.5 + 7.5) * 3100 / 4 =2 ^ 10 或 2 ** 1010 km to miles, 5 ft in cm1 kg to lb, 500 g in oz37 C to F, 100 F in C2.5 hours to mins, 90 s in min10 GB in MBsqrt(144)sin(pi / 2)abs(-5), ceil(4.2)