Match these. Please.

Radius 12 units,  area = π(12)² = 452.16 unit²

Diameter 16.8 units, area =  π(8.4)² = 221.5584 unit²
 
Radius 3.4 units, area = π(3.4)² = 36.2984 units²

Diameter 10 units, area =  π(5)² = 78.5 units²