To construct a square with 1 meter on each side, we need to fill a 1 meter by 1 meter area with 1-fm squares. To find how many 1-fm squares this will take, we just use a simple dimensional analysis:
[tex] \frac{1 m^{2} }{1} * \frac{10^{15}fm }{1m} *\frac{10^{15}fm }{1m}= 10^{30} fm^{2} [/tex]
ANSWER: Therefore, we will need [tex] 10^{30} [/tex] squares each measuring 1 femtometer to construct a square with side 1 meter.
