Which one is bigger: $\;35{,}043 × 25{,}430\,$ or $\,35{,}430 × 25{,}043\;$? 
Which of the two quantities is greater?
Quantity A: $\;\;35{,}043 × 25{,}430$
Quantity B: $\;\;35{,}430 × 25{,}043$

What is the best and quickest way to  get the answer without using calculation, I mean using bird's eye view?

Another simple method particularly suited to a deliberately 'symmetric' problem like this: $35{,}043\times 25{,}430=(25{,}043\times25{,}430)+(10{,}000\times25{,}430)$ while $25{,}043\times35{,}430=(25{,}043\times25{,}430)+(10{,}000\times25{,}043)$, and written out this way it's clear that the former has to be larger.
