It is known that a and b are natural numbers, a∨b=2a+b, a∨2a∨3a∨4a∨5a∨6a∨7a∨8a∨9a=3039, a=how much.
已知a、b为自然数，a∨b=2a+b，a∨2a∨3a∨4a∨5a∨6a∨7a∨8a∨9a=3039，a=多少．
<gadget id="calculator">3_039 / 1_013</gadget>
<output>3</output>

<result>3</result>