Create Custom Calculator that I can Embed in my Website

I need to Embed a code on my website where I can create a custom calculator I need a custom calculator to have these Comparisons Options: Using Any Other Real Estate Company Cost of Home: (Numerical Data will be entered here) Commission Percentage: (A percentage of the cost of home will enter here) Any Number from 1-3 Then Using Federated Realty: Cost of Home: (Numerical Data will be entered here) Fixed Cost: ($1,000, number will never change) Savings: (Commission Percentage - $1,000) = _________ SAVINGS Please let me know if you have any questions. Again, I will need this calculator to be embedded in my website. Please let me know if you have any questions. Thank you!