The sum of (2/3) of A and B is 60, and (4/9) of A is exactly equal to B. What is the sum of A and B?
甲数的(2/3)与乙数的和是60，甲数的(4/9)正好等于乙数，甲、乙两数的和是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(2/3) + (4/9)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">60 / (10/9)</gadget>
<output>54</output>

<gadget id="calculator">(4/9) * 54</gadget>
<output>24</output>

<gadget id="calculator">54 + 24</gadget>
<output>78</output>

<result>78</result>