Vocabulary consisting only from characters you are able to read
百万
ひゃくまん
(1)1,000,000, one million, million, (2)many mix
兆し
きざし
signs, omen, symptomsmix
十億
じゅうおく
1,000,000,000, billion (American), (obs) milliard (British)mix
億
おく
(num) 100,000,000, hundred millionjlpt4