《明史·志·卷八》
将从廉和从方相加，得一百八十万四千四百七十一度六十七分零四六零三七七八，就是下法。
以从廉、从方并，得一百八十零万四千四百七十一度六十七分零四六零三七八，为下法。
Add Cong Lian and Cong Fang, get one million eight hundred and forty-four thousand four hundred and seventy-one degrees sixty-seven minutes zero four six zero three seven eight, that is Xia Fa.