Can someone tell me what im doing worng

A ball drops from a height of 24 feet. Each time it hits the ground, it bounces up 30 percents of the height it fall. Assume it goes on forever, find the total distance it travels.

This is what I've done Sum from n=1 to infinity of (3/10)^n times 24

= 24/(1-3/10) = 240/7.