thirty to fifty cubic meters. 111 yuan can charge more than 51 cubic meters of natural gas according to the first step price of Fuyang residents' domestic gas (1.98 yuan/square), more than 41 cubic meters of natural gas according to the second step price of Fuyang residents' domestic gas (2.38 yuan/square), and more than 31 cubic meters of natural gas according to the third step price of Fuyang residents' domestic gas (2.96 yuan/square).