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As Smalltalk evaluates the expression 6 + 3 * 2, the message
+ 3 is sent to 6, which answers 9. Then, the message
* 2 is sent to 9, which answers 18. Thus, Smalltalk
takes 6 + 3 * 2 to be equivalent to (6 + 3) * 2, rather than
to 6 +(3 * 2), even though the precedence of multiplication is
higher than that of multiplication in ordinary arithmetic:
6 + 3 * 2 <-- Equivalent to (6 + 3) * 2, rather than 6 + (3 * 2)