$$(1- \frac{ 1 }{ 2 } ) \times (1- \frac{ 1 }{ 3 } ) \times (1- \frac{ 1 }{ 4 } ) \times (1- \frac{ 1 }{ 5 } ) \times (1- \frac{ 1 }{ 6 } ) \times (1- \frac{ 1 }{ 7 } ) \times (1- \frac{ 1 }{ 8 } ) \times (1- \frac{ 1 }{ 9 } ) \times (1- \frac{ 1 }{ 10 } ) \times (1- \frac{ 1 }{ 11 } )=$$
$\frac{1}{11}\approx 0.090909091$
$\frac{1}{11} = 0.09090909090909091$