Example

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

Question

$$40 \times 50 \times 31 \times 021 \times$$

Answer

1302000*

Solution


Simplify  \(40\times 50\)  to  \(2000\).
\[2000\times 31\times 021\]
Simplify  \(2000\times 31\)  to  \(62000\).
\[62000\times 021\]
Simplify  \(62000\times 021\)  to  \(1302000\).
\[1302000\]
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