Since this word is made up of a single kanji, it should use the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
"Everyone, we have rice! Come (こめ) and get it!"
I forgot to buy rice.
I heard that the weight of 100 million yen is about 10kg, so I tried to imagine what it would be like to hold 100 million yen while holding a bag of 10kg rice.
My favorite breakfast consists of uncooked rice and miso soup.