cy, 74 bytes

Result

WA

Duration

526ms

Code [DL]

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

stdin

58 28 57
28 43 01
50 02 44
18 90 73

stdout

stderr

/root/cy.rb:566:in `eval': (eval):1: syntax error, unexpected $undefined (SyntaxError)
...trix';p Matrix[*$<.map{|x|eval\"A=1,\"+x.split*?,}].det/6}"
...                              ^
(eval):1: syntax error, unexpected end-of-input, expecting '}'
...al\"A=1,\"+x.split*?,}].det/6}"
...                               ^
	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