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80=19.8+8+2\times 6.6-1
Multiply 3 and 6.6 to get 19.8.
80=27.8+2\times 6.6-1
Add 19.8 and 8 to get 27.8.
80=27.8+13.2-1
Multiply 2 and 6.6 to get 13.2.
80=41-1
Add 27.8 and 13.2 to get 41.
80=40
Subtract 1 from 41 to get 40.
\text{false}
Compare 80 and 40.
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Limits
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