Multiplication gives wrong answer

Following is my code and TensionData is an array imported from an excel file. comments shows the output of each line.

ave_yeild_ten =  mean(TensionData(1:10)); % this = 39.6200

K_B = 2.335;

std_yeild_ten = std(TensionData(1:10)); % this = 0.8108

yeild_ten = (ave_yeild_ten - (K_B * std_yeild_ten))*1000 %come out as 37726.87 but should be 37710.6

i figured that the error is in the part

(K_B * std_yeild_ten)

where it gives 1.8931 instead of 1.90943. what is the reason for this and how do I fix it? thanks!

[zepp]

How does 2.335*0.8108 equal 1.90943? It's actually equal to 1.893218.

[Adam]

Where do you get the information from that the answer should be 37710.6?

[Zcarfaz]

Oh god! I had a typo in my code caused the error. K_B should be 2.355. that was the reason my output and test case output was slightly off. anyway thanks y'all.