Earth has a radius of 6.38 × 106 m, and is about 1.50 × 1011 m from the Sun. Mars has a radius of 3.40 × 106 m, and is about 2.28 × 1011 m from the Sun. If the intensity of electromagnetic solar radiation at the Earth is about 1370 W/m2, what is the intensity of electromagnetic solar radiation at Mars?