Tom spends $250 to buy gems in a game he plays.  The game gives 100 gems for each dollar you spend.  Since he bought so many gems he got a 20% bonus of more gems. How many gems did he end up with?
He bought 250*100=
<gadget id="calculator">250*100</gadget>
<output>25_000</output>
25000 gems.
He got a 25,000*.2=
<gadget id="calculator">25000*.2</gadget>
<output>5_000</output>
5,000 gem bonus.
So he got a total of 25000+5000=
<gadget id="calculator">25000+5000</gadget>
<output>30_000</output>
30,000 gems.

<result>30_000</result>