  A search for R-parity-violating supersymmetry in final states with high jet
multiplicity is presented. The search uses $140{\text{fb}^{-1}}$ of
proton--proton collision data at $\sqrt{s} = 13{TeV}$ collected by the ATLAS
experiment during Run 2 of the Large Hadron Collider. The results are
interpreted in the context of R-parity-violating supersymmetry models that
feature prompt gluino-pair production decaying directly to three jets each or
decaying to two jets and a neutralino which subsequently decays promptly to
three jets. No significant excess over the Standard Model expectation is
observed and exclusion limits at the 95% confidence level are extracted.
Gluinos with masses up to 1800 GeV are excluded when decaying directly to three
jets. In the cascade scenario, gluinos with masses up to 2340 GeV are excluded
for a neutralino with mass up to 1250 GeV
