If (3/4)*A=(3/5)*B=1, then A+B=how much.
如果(3/4)*A=(3/5)*B=1，那么A+B=多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / (3/4)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / (3/5)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(4/3) + (5/3)</gadget>
<output>3</output>

<result>3</result>