Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$84 \times 20$$

Answer

1680

Solution


Use the algorithm method.
84
×20
1
1680
Therefore, \(84\times 20=1680\).
\[1680\]
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