For example, "5 * 10^80" would be said as "5 times 10 to the power of 80" in
English. When translating to Japanese, would I translate all of these
operations literally or is there a more widely used idiom like "5 followed by
80 zeroes".
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2022-03-04T15:16:05.343
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question
numbers mathematics
How do you read out numbers in scientific notation in Japanese?
> 5 * 10^80

I think it's read 「ごかけるじゅうのはちじゅうじょう」.

5×10⁸⁰ -- [5]{ご} [×]{かける} [10]{じゅう} の [⁸⁰]{はちじゅうじょう} （5[掛]{か}ける10の80[乗]{じょう}）
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2022-03-04T22:12:19.223
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answer
In addition to a scientific notation by Chocolate, we use [無量大数]{むりょうたいすう} for
such a large power. In [Japanese numeral
system](https://ja.wikipedia.org/wiki/%E5%91%BD%E6%95%B0%E6%B3%95), we
normally remember up to [兆]{ちょう} of 10^12. Normally we expect to pack such a
huge power as an unit like "mol" as an avogadro constant. So, we do not
normally count it like 無量大数. And in the context of mathematics, we use "log"
for it.

The table for 無量大数.

[![enter image description
here](https://i.stack.imgur.com/TJqkq.png)](https://i.stack.imgur.com/TJqkq.png)

The table for numeral system. [![enter image description
here](https://i.stack.imgur.com/7RVKv.png)](https://i.stack.imgur.com/7RVKv.png)
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answer