SB 5.20.38
etaval loka-vinyaso mana-laksana-samsthabhir vicintitah kavibhih sa tu pañcasat-koti-ganitasya bhu-golasya turiya-bhago ’yam lokalokacalah.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Learned scholars who are free from mistakes, illusions and propensities to cheat have thus described the planetary systems and their particular symptoms, measurements and locations. With great deliberation, they have established the truth that the distance between Sumeru and the mountain known as Lokaloka is one fourth of the diameter of the universe — or, in other words, 125,000,000 yojanas [1 billion miles].
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Srila Visvanatha Cakravarti Thakura has given accurate astronomical information about the location of Lokaloka Mountain, the movements of the sun globe and the distance between the sun and the circumference of the universe. However, the technical terms used in the astronomical calculations given by the Jyotir Veda are difficult to translate into English. Therefore to satisfy the reader, we may include the exact Sanskrit statement given by Srila Visvanatha Cakravarti Thakura, which records exact calculations regarding universal affairs.
sa tu lokalokas tu bhu-golakasya bhu-sambandhanda-golakasyety arthah; suryasy eva bhuvo ’py anda-golakayor madhya-vartitvat kha-golam iva bhu-golam api pañcasat-koti-yojana-pramanam tasya turiya-bhagah sardha-dvadasa-koti-yojana-vistarocchraya ity arthah bhus tu catus-trimsal-laksonapañcasat-koti-pramana jñeya; yatha meru-madhyan manasottara-madhya-paryantam sardha-sapta-pañcasal-laksottara-koti-yojana-pramanam; manasottara-madhyat svadudaka-samudra-paryantam san-navati-laksa-yojana-pramanam tatah kañcani-bhumih sardha-sapta-pañcasal-laksottara-koti-yojana-pramana evam ekato meru-lokalokayor antaralam ekadasa-sal-laksadhika-catus-koti-parimitam anyato ’pi tathatyeto lokalokal loka-paryantam sthanam dvavimsati-laksottarasta-koti-parimitam lokalokad bahir apy ekatah etavad eva anyato ’py etavad eva yad vaksyate, yo ’ntar-vistara etena hy aloka-parimanam ca vyakhyatam yad-bahir lokalokacalad ity ekato lokalokah sardha-dvadasa-koti-yojana-parimanah anyato ’pi sa tathety evam catus-trimsal-laksonapañcasat-koti-pramana bhuh sabdhi-dvipa-parvata jñeya; ata evanda-golakat sarvato diksu sapta-dasa-laksa-yojanavakase vartamane sati prthivyah sesa-nagena dharanam dig-gajais ca niscali-karanam sarthakam bhaved anyatha tu vyakhyantare pañcasat-koti-pramanatvad anda-golaka-lagnatve tat tat sarvam akiñcit-karam syat caksuse manvantare cakasmat majjanam sri-varaha-devenotthapanam ca durghatam syad ity adikam vivecaniyam.