Two charged Ping-Pong balls separated by a distance of 1.42m exert an electric force of 0.0224N on each other. What will be the force if the objects

Two charged Ping-Pong balls separated by a distance of 1.42m exert an electric force of 0.0224N on each other. What will be the force if the objects are brought closer, to a separation of only 31.4cm?