<s>[INST] Is $4 \times 6$ defined as $4 + 4 + 4 + 4 + 4 + 4$ or $6 + 6 + 6 + 6$? There are long debates among Indonesian netizens about this http://www.globalindonesianvoices.com/15785/is-4x6-the-same-as-6x4-this-primary-school-math-made-controversy-in-social-media/
 [/INST] Let $A \times B$ mean the addition of $A$ repeated $B$ times.
Since multiplication is commutative in $\mathbb{R}$, that tells us that $A \times B = B \times A$. In other words, the addition of $A$ repeated $B$ times is the same as the addition of $B$ repeated $A$ times.
Thus, $4 \times 6 = 4+4+4+4+4+4 = 6 \times 4 = 6+6+6+6$
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