Is there something wrong for calculate Defensive price?

I see there is weird Defensive Price for this one: https://www.grahamvalue.com/stock/csvvn

This is display:

Book Value Per Share (BVPS):
31,442.33
Tangible Book Value Per Share (TBVPS):
31,402.60
Earnings Per Share (EPS):
4,166.03
EPS - TTM:
4,368.60
EPS - 2 Years Ago:
7,134.03
EPS - 3 Years Ago:
4,298.79
EPS - 4 Years Ago:
3,636.14
EPS - 5 Years Ago:
5,013.11
EPS - 6 Years Ago:
5,232.26
EPS - 7 Years Ago:
4,971.07
EPS - 8 Years Ago:
3,988.32
EPS - 9 Years Ago:
3,017.44
EPS - 10 Years Ago:
3,174.28
EPS - 11 Years Ago:
2,939.82
EPS - 12 Years Ago:
1,797.50
Currency:
VND

Defensive Price (Graham №):
24,260.19
Enterprising Price (Serenity №):
15,848.74

But I re-calculate:

Defensive Price = sqrt(((4,298.79 + 7,134.03 + 4,166.03)/3) * 31,442.33 * 15 * 1.5) = 60,787.8
Enterprising Price = sqrt(31,402.60 * 4,166.03 * 12) = 39,551.1

Please let me know if I misunderstanding something.

Thanks for your time,
Divi