How to stop Pages from automatically calculating expressions?

I'm encountering something slightly annoying in Pages. Whenever I type something with an equal (=) sign, Pages treats the sentence as a mathematical expression and automatically processes the result. For example, if I type >2/3 = Pages automatically writes >2/3 =0,667 Or if I type >3G = it automatically considers the "G" as grams and writes >3G =0,106 oz I do not want nor need this annoying feature, but I can't find a way to disable it.