def dm_big
import bend-collections-laws-math@1.0.0.0/src/math/w64.bend as W64import Base
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as W
357def dm_big(+a: W.U64, +b: W.U64, +q: U32) -> W.U64 & W.U64:
358 (W.U64{q, 0}, sub(a, fst_q(mul_32_64(q, b))))