Kirt has a $6000 monthly salary when he started his job. After a year of working, his salary increased by 30%. How much are his total earnings after 3 years? Let's think first. Chain of thought:
His annual salary for the first year of working is 6000 x 12 = $72000. Kirt's monthly increase is $6000 x 30 / 100 = $1800. So, he received $6000 + $1800 = $7800 monthly on the second and third year of working. Kirt's annual salary in the second and third year was $7800 x 12 = $93600. . Thus, his total earning after 3 years is $72000 + $93600 + $93600 = $259200.
Therefore, the answer is 259200.