When you have a fraction, meaning you are dividing one number by another, you can always move the decimal point in both numbers, provided you move it the same number of places in each number (both numerator, and denominator), and in the same direction.
Now, when you are multiplying two numbers, you can always move the decimal point in both of them, provided you move it the same number of places in each factor, and in the opposite direction.
These two manipulations can significantly simplify the given operation.
Math in Songs
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An idea for a blog post about the math in song lyrics has been germinating
at MJ4MF for a while, but with the passing of the mathematically musical —
or sh...
8 hours ago