Number A is ɑ, which is b less than (2/3) of Number B, what is the formula of Number B?
甲数是ɑ，比乙数的(2/3)少b，求乙数列式为多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>