thin microstrip calculator mismatch

Hello i am trying to follow this manual on branch line coupler,i have made exactly the same input as on moment 2:53
as shown in the attached photos,but i get a totally different answer,why?

Thanks
https://www.youtube.com/watch?v=PksQJRDnsDI&t=628s

Unable to read the blurred screenshot clearly, but looks like you have height 0.8 versus 8.