These sentences below is about is how the Entrepenuers are making money off of the gold miners. So, the sentences below are some part of a poem, which is:

I thought: What will stampeders need?
Now I’m a Dawson millionaire!
I sell them ALL long underwear.

So what do these sentences mean?

My guess was right.

He's asking what the gold rush miners will need. He proclaims himself a millionaire in Dawson, near the gold mines.

But I still don't get it.can you explain with more details

These sentences are part of a poem that describes how an entrepreneur is making money off of the gold miners during the time of the Gold Rush. Let's break down the meaning of each line:

1. "I thought: What will stampeders need?"
- This line suggests that the entrepreneur is thinking about what the gold miners, referred to as "stampeders," will require or want during their journey. It implies that the entrepreneur is anticipating the needs of the miners.

2. "Now I’m a Dawson millionaire!"
- This sentence reveals that as a result of the entrepreneur's thinking and actions, they have become a millionaire in Dawson. This suggests that the entrepreneur has been successful and has amassed a significant amount of wealth.

3. "I sell them ALL long underwear."
- This line indicates that one of the items the entrepreneur identified as necessary for the gold miners is long underwear. The use of "ALL" suggests that the entrepreneur is selling this particular item to all the miners, emphasizing the extent of their customer base.

In summary, these sentences portray an entrepreneur who recognized the needs of gold miners during the Gold Rush, achieved great financial success in Dawson, and specifically made money by selling long underwear to the miners.