Answer
$20.4$ square feet
Work Step by Step
It is important not to be scared of long word problems such as this, and make sure to reread the question a couple of times if you ever feel stuck!
In this question, you are asked to find the area of a rectangular floor space at walmart.
The formula is given to calculate the area, which is (length x width)
or $l$ x $w$.
The value for both variables is given in the question.
$l = 5.1$ feet and $w = 4$ feet
Substitute these values back into the formula for area;
$l$ x $w$
= $5.1$ x $4$
= $20.4$ square feet
Always remember to include the unit, as you may end up losing marks if you don't. As the units for length and width in this case were in feet, when multiplied together we get square feet. This applies to other units too, such as if both measurements were in meters, the final answer would be in square meters.