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# 84000000/4 x 10^12

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84000000/4 x 10^12

$$\large \frac{84 \cdot 10^{6}}{4} \cdot 10^{12}=21 \cdot 10^{18}$$

$$\large \frac{84 \cdot 10^6}{4 \cdot 10^{12}}=21 \cdot 10^{-6}=0.000\ 021$$

What is correct? Please use brackets.

!

asinus  Mar 11, 2017
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#1
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Many of us on the forum (I think including YOU) had this discussion a few months ago and decided this representation was rather ambiguous, but most agreed it is

[(8.4 x 10^7)/4] x 10^12     so your first solution is the one considered correct by most of us and most calculators too......     use brackets to be clear !!!

ElectricPavlov  Mar 11, 2017

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