Brandon sold 86 geckos last year. He sold twice that many the year before. How many geckos has Brandon sold in the last two years?
Last year: 86 geckos
2 years ago: 86(2)=172.
Total number of geckos sold 86+172=
<gadget id="calculator">86+172</gadget>
<output>258</output>
258 geckos.

<result>258</result>