《晋书·志·第八章》
木星、火星、土星以各自的岁数减去合数，余下的乘以周天六十七万三千一百五十，除以日度法，所得商数为行星度数，余数为度余。
木、火、土各以合数减岁数，余以周天乘之，如日度法而一，所得则行星度数也，余则度余。
Subtract "he shu" from the respective years of Jupiter, Mars, and Saturn. Multiply the result by 673,150 (the number of days in a year), and divide it by "ri du fa" to get the number of degrees of the planet. The remainder is the remainder of the degree.