Yllion (pronounced / aɪ lj ən /) is a proposal from Donald Knuth for the terminology and symbols of an alternate decimal superbase system In it, he adapts the familiar English terms for large numbers to provide a systematic set of names for much larger numbersIn addition to providing an extended range, yllion also dodges the long and short scale ambiguity of illion（教科書13〜22ページ） ① 1億 おく を5こあつめた数 ② 10億 おく を7こと，1億 おく を3こと， 100万を5こあつめた数 ③ 1億Japanese dictionary search results for 億兆 Speak!
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