Calculator sucks

Number Theory Level 1

11×22×33×44×55×⋯×9999×100100\large {1}^{1}×{2}^{2}×{3}^{3}×{4}^{4}×{5}^{5}×\dots×{99}^{99}×{100}^{100}

What will be the unit's digit in the above expression?

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Abhay Tiwari by Abhay Tiwari
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