At the end of the 10th century scholarly monk Gerbert de Aurillac upgraded the abacus. Probably he learned it from the Arabs when he was in Spain. Gerbert abacus had 27 columns instead of 12 - so the range of possible numbers was essentially increased. Gerbert didn’t use pebbles or other counters for counting. He used instead special jetons with figures drawn on them. So, instead of 7 pebbles one jeton with figure 7 on it could be used. But they were not modern Arabian numbers. They were gobar figures. Zero - “0” was absent in gobar system.

Fragment of Gerbert Abacus