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1×1=111×11=121111×111=123211111×1111=1234321 \begin{array} {r c r c l } 1 &\times & 1 & = &1 \\ 11 & \times& 11 & = &121 \\ 111 & \times& 111 & =& 12321 \\ 1111 & \times& 1111 & =& 1234321 \\ \end{array} 1111111111××××1111111111====1121123211234321
Observe the equations above.
Hence, what is the value of
1111111111⏟10 1’s ×1111111111⏟10 1’s ? \underbrace{1111111111}_{10 \text{ 1's } } \times \underbrace{1111111111}_{10 \text{ 1's } } \; ?10 1’s 1111111111×10 1’s 1111111111?
Inspiration.
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