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kotlinlang

Read the message right before this one lol <https://kotlinlang.slack.com/archives/C0922A726/p1543533286026600>

But why you use log10 and stuf for rising number to an exponent

Assuming integers: `log10(5) = 0`, `log10(140) = 2`, so basically "how many powers of 10 are in there".
So for 5 and 15 you have to multiply 5 by however many lots of 10 are in 15 (1) and then add 15. However I notice now that I am missing a +1 in there, so it should be
`a * pow(10, log10(b) + 1) + b`
For 5 and 15 this becomes:
`5 * pow(10, log10(15) + 1) + 15`
which is `5 * pow(10, 1 + 1) + 15`
which is `5 * 100 + 15` which is `515` =&gt; the concatenated number.