ChatGpt – Calculating formula values wrongly

I tried ChatGpt to calculate area of Quadrilateral
with the below command:
“find the area of quadrilateral with sides 26m, 98m 16m & 90m”

ChatGpt used Brahmagupta’s formula to calculate area.
The S value Calculated by ChatGpt is 130, but the correct answer for S = 115

Formula used:
s = (a + b + c + d) / 2

ChatGpt calculated wrongly as:
s = (26 + 98 + 16 + 90) / 2 = 130

But the correct answer for above s is 115

– Yuvahere.com