Example

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

Question

$$\frac{ 67.5 }{ 360 } \times \frac{ 22 }{ 7 } \times 21 \times 21$$

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