Make a simulation website based on the calculation input ( webbased CI )

i need to make an output simulation website based on the input ( have calculation formula ) - the raw formulation based on excel - program must be at CI webbased menu : Loginpage 1. User management ( - add , nonaktif / active ) . , update delete 2. Simulation - New data simulasi  - Simulasi 1  - Simulasi 2 - list simulasi note : - there are only 2 type of simulation which have different formula calculation - the output of each simulation will be provided , and you need to make it the same - work must be done maximum 2 days , intensive. no delay