 <translate> The number of the increase in chicken after 9 years is 150 * 9 = 1350. So the total number of the chicken in Michael's farm will be 550 + 1350 = 1900.
The final answer: 1900. <yor> Nọmba ti ilosoke ninu adìyẹ lẹ́yìn ọdún mẹ́sàn-án jẹ́ 150 * 9 = 1350. Nítorí náà, iye gbogbo adìyẹ tó wà nínú oko Michael yóò jẹ́ 550 + 1350 = 1900. Ìdáhùn náà ni pé: Ọdún 1900. 