The parallelogram has a length of 21 and a width of 22. What is the area of this shape? Round to the nearest whole number.

Not enough information.

e.g. if the acute angle between the length and width is 30°
the area would be (21)(22)sin30°
if the acute angle between the length and width is 40°
the area would be (21)(22)sin40°
So it depends on that missing information.

If by "a width of 22" you mean the height is 22, then the area is simply
(21)(22) square units