Answer:华体会球衣

To solve the problem, we need to find the number of ways to choose 100 items from a set of 100 items, where each item can be chosen in 3 different ways. The total number of ways is calculated as follows:

1. Understanding the Problem:

   • We have 100 items.
   • Each item can be chosen in 3 different ways.
   • We need to choose 100 items.

2. Calculating the Number of Ways:

   • The number of ways to choose 100 items from 100 is given by the combination formula: [ \text{Number of ways} = \binom{100}{100} \times 3^{100} ]
   • Since (\binom{100}{100} = 1) (choosing all 100 items), the total number of ways is (3^{100}).

3. Final Answer: [ \boxed{3^{100}} ]