Answer :
3/4 mile = about 1.207 kilometer
1/2 mile = about 0.805 kilometer
(3/4 mile x 1/2 mile) = (1.207 kilometer x 0.805 kilometer)
= 0.971... square kilometer or 3/8 square mile .
(or 240 acres, or 1,161,600 square feet, or 97.124... hectares . . . etc.)