12₁₀ = 4*8⁰ + 1*8¹ = 14₈
31₁₀ = 7*8⁰ + 3*8¹ = 37₈
34₁₀ = 2*8⁰ + 4*8¹ = 42₈
40₁₀ = 0*8⁰ + 5*8¹ = 50₈
60₁₀ = 4*8⁰ + 7*8¹ = 74₈
71₁₀ = 7*8⁰ + 0*8¹ + 1*8² = 107₈
167₁₀ = 7*8⁰ + 4*8¹ + 2*8² = 247₈
12₁₀ = 4*8⁰ + 1*8¹ = 14₈
31₁₀ = 7*8⁰ + 3*8¹ = 37₈
34₁₀ = 2*8⁰ + 4*8¹ = 42₈
40₁₀ = 0*8⁰ + 5*8¹ = 50₈
60₁₀ = 4*8⁰ + 7*8¹ = 74₈
71₁₀ = 7*8⁰ + 0*8¹ + 1*8² = 107₈
167₁₀ = 7*8⁰ + 4*8¹ + 2*8² = 247₈