Fours and Fractions

Algebra Level 1

$\large { 4 }^{ \frac { 6 }{ 2 } }\div { 4 }^{ \frac { 3 }{ 2 } }\times { 4 }^{ \frac { 7 }{ 2 } }\div { 4 }^{ \frac { 20 }{ 4 } }\times { 4 }^{ \frac { 4 }{ 2 } } =\, ?$