Need help with formula multiplying two values

Hello, I hope somebody can help me. My field “Probability” should provide me the result from “% To Win” x (% to Go). Example would be
=(50*40)/100

I have made the following formula but can’t get it to divide by 100. What can I do? Can somebody help me?

multiply($bkv_probability_to_win_c,$bkv_probability_to_go_c),divide(100)

Thanks in advance