100*(1/2)*99*(1/2)
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100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
=100*99*(1/2)*(1/2)
=100*99*(1/4)
=25*99
=25*(100-1)
=2500-25
=2475.
100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
100*(1/2)*99*(1/2)
=100*99*(1/2)*(1/2)
=100*99*(1/4)
=25*99
=25*(100-1)
=2500-25
=2475.