300
A skydiver with no air resistance jumps from an airplane. During the first second of fall, he falls 5.3 meters, during the second second, he falls 14 meters, during the third second, he falls 22.7 meters, and during the fourth second, he falls 31.4 meters. If this continues, how many meters would he have fallen total in 12 seconds.
Sn=678.6 meters