For any natural numbers a and b, it is stipulated that a*b=2a-3b+1, and 10*X=9, then X=how much.
对于任意自然数a、b，规定a*b=2a-3b+1，且10*X=9，则X=多少．
<gadget id="calculator">11 / 3</gadget>
<output>11/3 = around 3.666667</output>

<result>11/3 = around 3.666667</result>