Here is the solution for the problem:
1m * 1m = 1m²
1m = 1,000,000µm = 1 x 10^6µm
1 x 10^6µm * 1 x 10^6µm = 1m²
1x10^12µm² = 1m² (Now, divide both sides by 1x10^12).
1x10^12µm² / (1 x 10^12) = 1m² / (1 x 10^12)
1µm² = 0∙000 000 000 001 m² (x both sides by 1.5).
1.5µm² = 0∙000 000 000 0015 m²
1.5µm² = 1∙5x10^-12 m²
So 1.50 micrometers^2 is equal to 1.5 x 10^-12 m². I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.