Solve for f
f=10
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f≔10
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f=\frac{1}{2}\times 4\times 5
Cancel out 2\times 3\times 12 in both numerator and denominator.
f=\frac{1}{2}\times 20
Multiply 4 and 5 to get 20.
f=\frac{20}{2}
Multiply \frac{1}{2} and 20 to get \frac{20}{2}.
f=10
Divide 20 by 2 to get 10.
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