英文高中物理题（简单）求解Suppose that a planet was reported to be orbiti

英文高中物理题（简单）求解
Suppose that a planet was reported to be orbiting the sun-like star Iota Horologii with a period of 300 days. Find the radius of the planet's orbit, assuming that Iota Horologii has four times the mass as the Sun. (This planet is presumably similar to Jupiter, but it may have large, rocky moons that enjoy a pleasant climate. Use 2.00 ✕1030 kg for the mass of the Sun.)
我已经把等式列出来了 T^2GM=4π^2R^ 求答案