Land Conversion Calculator

Make a website in which the input (Bigha, Katha, Dhur, Dhurki) is together and its conversion is in (Acer, Decimal), some fact data [ 1 Bigha = 20 Katha, 1 Katha = 20 Dhur, 1 Dhur = 20 Dhurki, 100 Decimal = 1 Acer, 1 Katha = 4.366 Decimal, 1 Dhur = 0.218 Decimal, 1 Dhurki = 0.0109 ]