80% of Lelejia's income in the previous year was equal to 75% of last year's income, and their family's income in the previous year was 24,000 yuan. How much was their family's income last year?
乐乐家前年收入的80%等于去年收入的75%，前年他们家的收入是24000元．去年他们家的收入是多少元？
<result>256</result>