In the common Jain traditional measure, 1 Dhanushya = 6 feet, so 500 Dhanushya = 3000 feet, which is about 914.4 meters. ( jainknowledge.com)

Some Jain sources use a different traditional value for 1 Dhanushya, so the exact figure can vary slightly by text/tradition. ( jainstutistavan.com)