The difference between the two numbers A and B is 0.4, and (3/4) of A is equal to (5/6) of B. What is the sum of A and B?
甲、乙两数的差是0.4，甲数的(3/4)和乙数的(5/6)相等，甲、乙两数的和是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 0.4</gadget>
<output>0.3</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) - (3/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">0.3 / (1/12)</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 + 3.6 + 0.4</gadget>
<output>7.6</output>

<result>7.6</result>