Ron used a calculator to determine that 0.35*2.4=0.84. Ron wants to know why the rule about adding up the number of places to the right of the decimal point doesnt work in this case. Why aren't there 2+1=3 digits to the right of the decimal point in the answer? Is Ron correct that the rule about adding the number of places to the right of the decimal points is not correct in this case?

Explain.