(2000/ 100)*2+(( 10000-2000)/ 100)*(0.8~ 1.0)

If the incremental part is 0.8, then:

Building area 10000㎡, parking spaces 104.

If 1.0 is required for the incremental part, then:

Building area10000m2, parking spaces 120.

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20 1 1 Technical Regulations on Urban Planning and Management of Haikou City stipulates that:

The part less than or equal to 2000 m2 is 2.0, and the part exceeding 2000 m2 is increased upwards based on 2000 m2, and the increased part is 0.8~ 1.0, 0.4~0.6 in the old city and 7.5 in bicycles and motorcycles.

Other places have different regulations, such as Jiangsu, which is another regulation:

Commercial facilities, parking space/100㎡ construction area, with the lower limit of Class I area of 0.5, the upper limit of 0.8, the lower limit of Class II area of 0.8 and the lower limit of Class III area of 0.7.