How many square meters is a football ground?

A football field is 100 yards long

100 yd x 3 ft/yd x 12 in/ft x 2.54 cm/in x 1 m/100 cm = 91.4 m

A football field is 53.3 yards wide.

53.3 yd x 3 ft/yd x 12 in/ft x 2.54 cm/in x 1 m/100 cm = 48.7 m

91.4 x 48.7 = 4451 square meters.

However, since we only have three significant digits, we should say 4,450 square meters.