For any natural numbers a and b, it is stipulated that a*b=2*a+b. If: a*2a*3a*4a*5a*6a*7a*8a*9a=2026, what is the value of a?
对任意自然数a、b，规定a*b=2*a+b．若有：a*2a*3a*4a*5a*6a*7a*8a*9a=2026，则a的值是多少？
<result>2</result>