Complex sentence: In Tibetan Buddhism, often larger malas are used of for example 111 beads: when counting, they calculate one mala as 100 mantras, and the 11 additional beads are taken as extra to compensate for errors.
Split into simpler sentences: In Tibetan Buddhism, often larger malas are used; for example, malas of 111 beads. When counting, they calculate one mala as 100 mantras, and the 11 additional beads are taken as extra to compensate for errors.