Problems with triangle area

Question

The lesson asked me to code a program that outputs a triangle area, with width and length as inputs. However, the inputs of the first test case were 1 and 42, and my program output was 21, totally different from the expected output, which was 42. So I don't know exactly whether I was wrong or the web. This is the best I could explain, but I would gladly explain further if asked!

Answer 1

Can you send the link to the code?