What is the product of the sum of (2/3) and (3/5) multiplied by the reciprocal of (4/5)?
(2/3)与(3/5)的和乘(4/5)的倒数，积是多少？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(2/3) + (3/5)</gadget>
<output>19/15 = around 1.266667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / (4/5)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(19/15) * (5/4)</gadget>
<output>19/12 = around 1.583333</output>

<result>19/12 = around 1.583333</result>