At the beginning of 2019, Robotics Inc. acquired a manufacturing facility for $12 million. $9 million of the purchase price was allocated to the building. Depreciation for 2019 and 2020 was calculated using the straight-line method, a 25-year useful life, and a $1 million residual value. In 2021, the estimates of useful life and residual value were changed to 20 years and $500,000, respectively. What is depreciation on the building for 2021?