Answer
$$0.044 \ N/m^2$$
Work Step by Step
We have
$$
\frac{0.497\ N }{ (1.4\ m)(8.0\ m)}=0.0443\ N/m^2
.$$
Now, round this product to two significant digits, which is the accuracy of the least accurate measurement. That is,
$$0.0443\ N/m^2=0.044 \ N/m^2$$
