Which two numbers (not individual digits)

\( [(39 – 3)\div 6] + 11 \times 2 – 4 \times 5 = 13\)
3 and 6
change number
$ [(39 – 6)\div 3] + 11 \times 2 – 4 \times 5 = 13 $
= $ [33 \div 3] +11 \times 2 - 4 \times 5 = 13 $
= 11 + 22 - 20 = 13
Answer = 13