Help!!!Strange problem with scientific calculator. I was doing chemical equilibrium problems where one of the steps required me to square the reciprocal. Which was (1/4.2x10^52)^2 The correct answer for this is 5.7 x 10^-106 but my Casio FX 115 ES calculator keeps showing zero. Can anyone please shed some insight on this. It would be greatly appreciated. I have used this calculator in the past with success. I never encountered such a problem before. I have my exam on Tuesday. BTW no graphing calculators are allowed. If this doesnot workout then I will have to purchase another scientific calculator.