Answer :
[tex]\frac{4}{\frac{1}{2}}*\frac{2\frac{1}{2}}{\frac{1}{2}}*\frac{1\frac{1}{2}}{\frac{1}{2}}\\\frac{4(2)}{1}*\frac{\frac{5}{2}}{\frac{1}{2}}*\frac{\frac{3}{2}}{\frac{1}{2}}\\\frac{8}{1}*\frac{5}{1}*\frac{3}{1}\\120[/tex]