cy, 72 bytes

Result

WA

Duration

580ms

Code [DL]

"\\#{require'matrix';p Matrix[*$<.map{|x|eval'A=1,'+x.split*?,}].det/6}"

stdin

38 21 98
95 02 09
32 92 93
44 96 89

stdout

stderr

/root/cy.rb:566:in `eval': (eval):1: Invalid octal digit (SyntaxError)
A=1,95,02,09
          ^~
	from (eval):1:in `block (2 levels) in string'
	from (eval):1:in `each_line'
	from (eval):1:in `each'
	from (eval):1:in `map'
	from (eval):1:in `block in string'
	from /root/cy.rb:566:in `eval'
	from /root/cy.rb:566:in `block in string'
	from /root/cy.rb:665:in `block in exec'
	from /root/cy.rb:660:in `each'
	from /root/cy.rb:660:in `exec'
	from /root/cy.rb:777:in `block (3 levels) in <main>'
	from /root/cy.rb:844:in `<main>'

strace