(1/3) of number A is 2 less than number B, and (1/2) of number A is (4/5) of number B. What is the sum of number A and number B?
甲数的(1/3)比乙数少2，甲数的(1/2)是乙数的(4/5)，甲数与乙数的和为多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 * (4/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * (4/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(1/2) - (4/15)</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">(8/5) / (7/30)</gadget>
<output>48/7 = around 6.857143</output>

<gadget id="calculator">(8/5) / (7/30) / (4/5)</gadget>
<output>60/7 = around 8.571429</output>

<gadget id="calculator">(1/2) * (60/7)</gadget>
<output>30/7 = around 4.285714</output>

<gadget id="calculator">(48/7) + (30/7)</gadget>
<output>78/7 = around 11.142857</output>

<result>78/7 = around 11.142857</result>