Duan Rong looked at the two and said, "This is Bead Heart Calculation."
When Duan Rong was checking accounts at the Yuan Shun Escort Agency, he absorbed the artifact spirit of Li Jun's abacus, a mental calculation genius, thus gaining the ability of mental calculation.
"Bead Heart Calculation? Really?" Although Yin Cong heard Duan Rong say this, he still picked up the abacus on the counter and started fiddling with it.
After fiddling with the abacus beads for a while, Yin Cong found that it was indeed as Duan Rong said, and then half-heartedly praised, "Impressive, junior brother."
The two of them, with two bags of medicine, then prepared to leave.
Just as Duan Rong was about to leave, the woman behind the counter suddenly asked, "Lad, do you really know Bead Heart Calculation?"
Duan Rong smiled without answering.
The woman immediately asked, "What is the number when you subtract 3977 from 9865?"
Duan Rong was already turning away, and casually replied.
"5888."
