How do i convert 5'x2'x3' area into liters?

1 inch = 0.0254 meter . so now convert the all inches into a meter.

5x0.0254=0.127 m

2x0.0254=0.0508 m

3x0.0254=0.0762 m

0.127x 0.0508 x0.0762 =0.000491612 cubic meter

1 litre = 1000 m

0.000491612 x 1000 =0.4916 litres