Beauty of mathematics

\[\left( \underbrace{0\times 8+0}_{0} \right)\times 9+8=8\]
\[\left( \underbrace{1\times 8+1}_{9} \right)\times 9+7=88\]
\[\left( \underbrace{12\times 8+2}_{98} \right)\times 9+6=888\]
\[\left( \underbrace{123\times 8+3}_{987} \right)\times 9+5=8888\]
\[\left( \underbrace{1234\times 8+4}_{9876} \right)\times 9+4=88888\]
\[\left( \underbrace{12345\times 8+5}_{98765} \right)\times 9+3=888888\]
\[\left( \underbrace{123456\times 8+6}_{987654} \right)\times 9+2=8888888\]
\[\left( \underbrace{1234567\times 8+7}_{9876543} \right)\times 9+1=88888888\]
\[\left( \underbrace{12345678\times 8+8}_{98765432} \right)\times 9+0=888888888\]