My dear King, the carriage of the sun-god's chariot is estimated to be 3,600,000 yojanas (28,800,000 miles) long and one-fourth as wide (900,000 yojanas, or 7,200,000 miles)

Expressions researched:
"My dear King, the carriage of the sun-god's chariot is estimated to be 3,600,000 yojanas" |"28,800,000 miles" |"long and one-fourth as wide" |"900,000 yojanas, or 7,200,000 miles"

Srimad-Bhagavatam

SB Canto 5

My dear King, the carriage of the sun-god's chariot is estimated to be 3,600,000 yojanas [28,800,000 miles] long and one-fourth as wide [900,000 yojanas, or 7,200,000 miles].

SB 5.21.15, Translation and Purport

My dear King, the carriage of the sun-god's chariot is estimated to be 3,600,000 yojanas [28,800,000 miles] long and one-fourth as wide [900,000 yojanas, or 7,200,000 miles]. The chariot's horses, which are named after Gāyatrī and other Vedic meters, are harnessed by Aruṇadeva to a yoke that is also 900,000 yojanas wide. This chariot continuously carries the sun-god.

In the Viṣṇu Purāṇa it is stated:

gāyatrī ca bṛhaty uṣṇig

jagatī triṣṭup eva ca

anuṣṭup paṅktir ity uktāś

chandāṁsi harayo raveḥ

The seven horses yoked to the sun-god's chariot are named Gāyatrī, Bṛhati, Uṣṇik, Jagatī, Triṣṭup, Anuṣṭup and Paṅkti. These names of various Vedic meters designate the seven horses that carry the sun-god's chariot.