4) Solve the following problems
Q. Perform each of the following calculations. Round off your answers to three digits.
a. (3.26×104) (1.54×106)
b. (8.39×107) (4.53×109)
c)\(8.94 × 10^6\over 4.35 × 10^4\)
d)\((9.28 × 10^9) (9.9 × 10^{-7})\over (511) (2.98× 10^{-6}) \)