What is the valur of solar constant if the energy received by 12m^2 are in minutes in 2016? (Please explain how we got the answer)

The Solar constant is the measure of radiation energy received from the Sun per unit of area per unit of time,that would be incident on a plane perpendicular to the Sun’s rays and at Earth’s mean distance from the Sun (roughly the mean distance from the Sun to the Earth). Therefore is a constant and the value of this constant is approximately 1.368 KW/m2.This constant actually varies by about 0.3% over the 11-year solar cycle but averages about 1,368 W/m2. It is most accurately measured from satellites where atmosphere effects are absent.