The overall reaction for the glycolysis reaction is

C6H12O6(aq)+ 2NAD+(aq)+2ADP3−(aq)+2HPO2−4(aq)+2H2O(l)→ 2CH3COCO−2(aq)+2NADH(aq)+2ATP4−(aq)+2H3O+(aq)

For this reaction,  ΔrGo′298 = -80.6 kJ/mol (biological standard)

What is the value of  ΔrGo298 ?