200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)

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200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
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200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)

200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
200*(1-1/2)*(1-1/3)*(1-1/4)*.*(1-1/100)
=200*(1/2*2/3*3/4*……*99/100)
=200*1/100
=2